Reloading Basics
Reference
A comprehensive reference for handloaders covering press types, dies, primers, powder families, brass prep, bullet types, measuring tools, pressure standards, and safety context — with real brand references across every category. No load recipes, no charge tables, no step-by-step ammunition assembly instructions.
This is a general sequence overview, not a procedure. Actual steps, order, and requirements vary by cartridge type, press type, and platform. Always follow the specific workflow documented in your reloading manual and die instructions.
| Press Type | Best Fit | Main Advantage | Main Tradeoff | Notable Brands / Models |
|---|---|---|---|---|
| Single-Stage | Precision rifle loads, new reloaders, small batches, load development | Maximum control and visibility over each step; simplest to learn | Slowest throughput — one operation per pull | RCBS Rock Chucker Supreme, Redding Boss, Forster Co-Ax, Lee Breech Lock Challenger, Hornady Iron Press, Lyman Crusher Expert |
| Turret | Multi-caliber users, moderate volume, simpler changeover | Multiple dies mounted simultaneously; easier caliber swaps than progressive | Slower than progressive; still one round at a time on most models | Redding T-7 Turret, Lee Classic Turret, Lyman All-American 8, RCBS Turret Press |
| Progressive | High-volume pistol/rifle, competition shooters with established QC | Multiple operations per pull; fastest production once tuned | More complex setup, more ways to make undetected errors, steeper learning curve | Dillon XL 750, Dillon RL 1100, Hornady Lock-N-Load AP, Lee Loadmaster, RCBS Pro 2000, Mark 7 Apex (automated) |
Common pattern: Many reloaders start on a single-stage to build inspection discipline, add a turret for convenience, and only move to a progressive when their process control and documentation habits are already solid. Skipping the learning curve creates risk.
- Sizing / Decapping: Restores case dimensions and pushes out the spent primer. Full-length dies resize the entire case; neck dies resize only the neck
- Expander: Opens the case mouth to accept the bullet. Required for straight-wall pistol and revolver cartridges; built into some bottleneck sizing dies
- Seating: Presses the bullet to a specific depth/OAL. Micrometer-adjustable versions allow repeatable depth changes
- Crimp: Applies taper crimp (semi-auto pistol) or roll crimp (revolver, lever). Some seating dies crimp simultaneously; dedicated crimp dies offer more control
- Factory Crimp (Lee): Lee's post-sizing crimp die that also applies a light full-length sizing pass. Popular for ensuring reliable chambering in semi-auto platforms
- Specialty: Small base dies (tight-chamber ARs), bushing dies (precise neck tension control), collet dies (minimal case work), mandrel dies (inside-out neck sizing)
| Brand | Known For |
|---|---|
| Redding | Competition and Type S bushing dies; micrometer seating; premium precision line |
| Forster | Bench Rest seating dies; Co-Ax system; hand-die neck turners; precision-oriented |
| RCBS | Widest caliber coverage; Gold Medal Match dies; solid mid-to-premium tier |
| Hornady | Custom Grade and Match dies; Lock-N-Load bushing system; good value |
| Lee Precision | Budget-friendly; Collet Neck dies; Factory Crimp die; widest affordable range |
| Dillon | Carbide pistol dies optimized for progressive press use; three-die pistol sets |
| Whidden Gunworks | Custom bushing dies for precision rifle; small-batch production; competition pedigree |
| L.E. Wilson | Hand dies, inline seaters, and case gauges for benchrest and F-class |
Compatibility: Most dies use standard 7/8"×14 TPI threading. Verify press compatibility for Dillon-specific, Redding Big Boss, or Co-Ax systems. Die lock ring, shellholder, and shell plate compatibility matters too.
| Tool | What It Does | Why It Matters | Notable Brands |
|---|---|---|---|
| Digital Calipers | Measures OAL, case length, bullet diameter, case mouth, and rim dimensions | The single most important measuring tool on the bench — used at nearly every step | Mitutoyo (gold standard), Starrett, iGaging, Frankford Arsenal, RCBS |
| Powder Scale | Weighs powder charges to 0.1 grain or 0.02 grain accuracy | Charge weight directly controls pressure and velocity — errors here are the most dangerous kind | RCBS ChargeMaster Lite, A&D FX-120i, Hornady Auto Charge Pro, RCBS M500, GemPro 250 |
| Powder Measure | Dispenses volumetric powder charges at consistent weight | Speeds up high-volume loading; must be verified by scale checks at regular intervals | Redding Competition BR-30, RCBS Uniflow, Hornady Lock-N-Load, Dillon (press-mounted) |
| Case Gauge | Verifies that a loaded round fits within spec dimensions for a given chamber | Catches sizing issues, high primers, and OAL problems before they reach the range | L.E. Wilson, Lyman, Dillon (caliber-specific), Sheridan Slotted |
| Headspace Comparator | Measures headspace (datum to base) on a fired or resized case | Critical for bolt rifle precision and ensuring proper shoulder bump during full-length sizing | Hornady Lock-N-Load Headspace Comparator, Redding Instant Indicator |
| Bullet Comparator | Measures CBTO (base to ogive) for consistent seating depth | More repeatable than tip-to-base OAL because bullet tips vary in shape | Hornady Lock-N-Load Bullet Comparator inserts, Sinclair |
| Primer Pocket Tools | Uniforming reamers, pocket cleaners, swaging tools for crimped pockets | Consistent primer seating depth and pocket dimension improve ignition uniformity | RCBS, Lyman, Frankford Arsenal, Dillon Super Swage |
| Case Trimmer | Removes excess brass from case mouths that have stretched beyond trim length | Over-length cases can jam into the throat and spike pressure dangerously | WFT (World's Finest Trimmer), Giraud Power Trimmer, RCBS Trim Pro, Lyman Universal, L.E. Wilson |
| Category | Size | Typical Use | Key Notes |
|---|---|---|---|
| Small Pistol (SP) | 0.175" diameter | 9mm, .380 ACP, .38 Special, .357 SIG | Most common primer in handgun reloading; softer cup than rifle primers |
| Large Pistol (LP) | 0.210" diameter | .45 ACP, .44 Mag, 10mm, .41 Mag | Larger pocket; required for large-primer pistol cases |
| Small Rifle (SR) | 0.175" diameter | .223 Rem / 5.56 NATO, 6.5 Grendel, 7.62×39 (some) | Harder cup than pistol primers to withstand higher rifle pressures and free-floating firing pins |
| Large Rifle (LR) | 0.210" diameter | .308 Win, .30-06, 6.5 Creedmoor, .300 Win Mag | Standard large rifle primer; used across most full-size rifle cartridges |
| Small Rifle Magnum | 0.175" diameter | Ball powder charges, cold-weather loads in SR cases | Hotter flame for harder-to-ignite propellants; not interchangeable with standard SP/SR without data |
| Large Rifle Magnum | 0.210" diameter | .300 Win Mag, 7mm Rem Mag, large-case magnums | Required for consistent ignition in high-capacity magnum cases; hotter than standard LR |
CCI and Federal are the most widely available and referenced in load manuals. Federal Gold Medal Match primers are considered the benchmark for precision rifle. Winchester primers are widely used in factory-equivalent loads. Different brands produce different flame characteristics — never substitute without consulting published data for that specific combination.
- Never substitute primer types without verified load data for that exact combination
- Never seat a primer above flush — high primers are a slam-fire risk
- Never use pistol primers in rifle cases (or vice versa) unless published data specifically calls for it
- Store primers in original packaging, away from heat, moisture, and static
- Small pistol and small rifle primers are the same physical size but NOT interchangeable — cup hardness differs
Powder selection must come from published load data for the exact cartridge, bullet weight, primer type, and case you are using. This table shows general burn-rate families and common powder names for orientation purposes only — not as load recommendations.
| Family | Typical Application | Common Powder Names (Orientation Only) | Key Characteristic |
|---|---|---|---|
| Fast Pistol | Light pistol loads, .380 ACP, target 9mm | Hodgdon Titegroup, Vihtavuori N310, Alliant Bullseye, Winchester 231 / HP-38 | Very small charge windows — 0.1 gr errors matter significantly at these volumes |
| Medium Pistol | Standard 9mm, .40 S&W, .45 ACP, 10mm | Hodgdon CFE Pistol, Alliant Power Pistol, Vihtavuori N320/N330, Alliant Sport Pistol, Accurate #5 | Broader window than fast powders; workhorse category for most handgun reloading |
| Slow Pistol / Fast Rifle | Magnum revolver, .300 BLK subsonic, PCC | Hodgdon H110 / Winchester 296, Alliant 2400, Accurate 1680, Hodgdon Lil'Gun | Higher energy; used where magnum-level ignition and pressure are expected |
| Small Rifle | .223 Rem / 5.56 NATO, 6.8 SPC, .22-250 | Hodgdon H335, Hodgdon BL-C(2), Vihtavuori N133/N135, Hodgdon Varget (also medium) | Common in small-case rifle cartridges; ball powders meter well in progressive presses |
| Medium Rifle | .308 Win, 6.5 Creedmoor, .243 Win, .260 Rem | Hodgdon Varget, IMR 4064, Vihtavuori N140/N150, Alliant Reloder 15, Hodgdon H4895 | The most versatile rifle category; Varget and Reloder 15 are among the most popular rifle powders ever made |
| Slow Rifle | .30-06, .270 Win, 7mm Rem Mag, heavy .308 loads | Hodgdon H4350, IMR 4350, Vihtavuori N160/N165, Alliant Reloder 16/17 | H4350 and N160 are considered among the most versatile slow-burn powders in the industry |
| Very Slow / Magnum | .300 Win Mag, .338 Lapua, 7mm PRC, 6.5 PRC | Hodgdon H4831, Hodgdon Retumbo, Vihtavuori N565/N570, Alliant Reloder 23/26, Winchester StaBALL 6.5 | Large case capacity; temperature-stable formulations (StaBALL, Reloder 26, N565) are increasingly preferred for precision |
Rule that matters: Select powder from a current published load source for the exact cartridge, bullet weight/profile, primer class, and pressure standard you are using. Burn-rate charts are orientation tools, not substitution guides. A powder that works in one cartridge can be catastrophically wrong in another.
| Type | Abbreviation | Construction | Typical Use |
|---|---|---|---|
| Full Metal Jacket | FMJ | Lead core with copper jacket fully covering the nose | Range training, target practice, military ball ammo; cheapest per-round |
| Jacketed Hollow Point | JHP | Copper jacket with exposed lead cavity at the tip | Self-defense, duty, hunting; designed to expand on impact |
| Boat Tail Hollow Point | BTHP / OTM | Tapered base with hollow point; may or may not expand | Precision rifle, long-range competition; Sierra MatchKing is the benchmark |
| Polymer Tip | Various (ELD-X, SST, V-MAX, AccuBond) | Plastic tip over hollow cavity with boat tail | Hunting and precision; tip improves BC and initiates expansion; brand-specific designs vary widely |
| Soft Point | SP / JSP | Exposed lead tip with partial copper jacket | Hunting; reliable expansion without the complexity of polymer-tip designs |
| Lead Cast / Hard Cast | LRN, SWC, WC | All-lead or hardened lead alloy, sometimes gas-checked | Revolver, cowboy action, subsonic, budget practice; requires proper sizing and lubrication |
| Plated | — | Lead core with thin copper plating (electroplated) | Budget practice; less fouling than cast lead; not as durable as full jacket at high velocity |
| Monolithic / Solid Copper | Various (Barnes TSX, TTSX, Hornady GMX, Lehigh) | 100% copper or copper alloy — no lead core | Hunting where lead-free is required or preferred; deep penetration; California-compliant |
- Sort by caliber, headstamp, and firing count — never mix unknown brass into precision loads
- Inspect for cracks, split necks, loose primer pockets, deformed rims, case head separation rings, and corrosion
- Clean enough to make defects visible — tumble (wet or dry) or ultrasonic
- Resize and verify dimensions with calipers and case gauge
- Measure case length — trim and chamfer any brass exceeding published trim-to length
- Deburr flash holes and uniform primer pockets where precision demands it
- Keep brass lots separate when consistency matters for your application
- Discard questionable brass — a $0.30 case is not worth a $1,500 rifle barrel or a hospital visit
| Method | How It Works | Best For |
|---|---|---|
| Dry Tumbling | Corn cob or walnut media in a vibratory tumbler | General cleaning; cheap and effective; dusty; does not clean primer pockets well |
| Wet Tumbling | Stainless steel pins + water + cleaning solution in a rotary tumbler | Inside-and-out cleaning including primer pockets and flash holes; produces like-new brass |
| Ultrasonic | High-frequency sound waves in heated cleaning solution | Batch cleaning; effective for light residue; less aggressive than SS pin tumbling |
The Sporting Arms and Ammunition Manufacturers' Institute sets pressure, dimensional, and chamber standards for the U.S. commercial market. Most American-published load data is developed against SAAMI specifications. SAAMI MAP (Maximum Average Pressure) is the primary safety ceiling for any given cartridge.
The Commission Internationale Permanente sets European pressure and dimensional standards. CIP and SAAMI measure pressure differently (different transducer placement) and their numbers are not directly interchangeable. European-published data uses CIP specs.
+P indicates a SAAMI-recognized higher-pressure variant for specific cartridges (9mm +P, .38 Special +P, .45 ACP +P). +P+ has no formal SAAMI standard — it indicates pressure above +P with no defined ceiling. Firearms must be explicitly rated for +P; +P+ use is at the shooter's risk.
Critical: A firearm being chambered for a cartridge does not automatically mean it is rated for +P. Always verify with the firearm manufacturer. Loading to +P or above +P pressure levels without confirmed firearm support and verified load data is dangerous.
| Cartridge | SAAMI MAP (Standard) | SAAMI MAP (+P) | Notes |
|---|---|---|---|
| 9mm Luger | 35,000 PSI | 38,500 PSI | +P is widely supported in modern 9mm pistols; verify with manufacturer |
| .38 Special | 17,000 PSI | 20,000 PSI | +P safe in modern revolvers; NOT safe in lightweight aluminum-frame snubbies without +P rating |
| .45 ACP | 21,000 PSI | 23,000 PSI | +P exists but less common; some older 1911s may not be rated |
| .223 Rem | 55,000 PSI | — | No +P designation; 5.56 NATO operates at higher pressure (~62,000 PSI CIP) in a different chamber spec |
| .308 Win | 62,000 PSI | — | No +P designation; 7.62 NATO operates at a slightly different pressure standard |
- Double charge: Two powder charges in one case — catastrophic over-pressure; most common with fast pistol powders that don't fill the case visually
- Squib load: Insufficient or no powder charge — bullet lodges in bore; next round fired behind it destroys the barrel and potentially the shooter
- Wrong powder: Accidentally using a fast powder in a recipe calling for a slow powder (or vice versa) — extreme pressure excursion
- Over-max charge: Exceeding published maximum load data — pressure spike, case failure, potential injury
- Wrong primer: Using magnum primers where standard was tested (or rifle in pistol cases) — invalidates all pressure data
- Over-length case: Brass exceeding trim-to length jams into the throat — pressure spike on firing
- Using outdated load manual data — powder formulations change; always use current editions
- Mixing brass headstamps in precision loads — case volume varies by manufacturer
- Not verifying powder charge weight at regular intervals on progressive presses
- Skipping the case gauge step — a round that won't chamber at the range is embarrassing; a round that over-pressures because of a sizing issue is dangerous
- Starting load development at max charge instead of starting low and working up
- Not keeping a reloading log — when something goes wrong, you need to trace back to the exact lot, charge, and setup
- Visual powder check after charging — look into every case before seating a bullet; this catches doubles and no-charges
- Verify scale zero before every session and spot-check charges throughout
Every reloading bench should have at least one current published manual. Cross-referencing two or more sources is best practice. Online data from powder and bullet manufacturers supplements — but does not replace — printed manuals.
| Source | Publisher | Format | Notes |
|---|---|---|---|
| Lyman Reloading Handbook | Lyman Products | The most brand-neutral manual; widest bullet/powder matrix; currently in 51st edition | |
| Hornady Handbook of Cartridge Reloading | Hornady | Focused on Hornady bullets; excellent cartridge drawings and process sections; currently 11th edition | |
| Sierra Reloading Manual | Sierra Bullets | Print + Digital | Sierra bullet data; widely respected for precision rifle loads; Infinity software version available |
| Nosler Reloading Guide | Nosler | Print + Online | Nosler bullet data; strong hunting bullet coverage (Partition, AccuBond, E-Tip) |
| Hodgdon / IMR / Winchester Data | Hodgdon Powder | Online (free) | hodgdonreloading.com — the most current powder data available; covers three major powder brands |
| Vihtavuori Load Data | Vihtavuori / Nammo | Online (free) | vihtavuori.com — excellent data for N-series powders; PDF downloads by cartridge |
| Alliant Powder Data | Alliant / Vista Outdoor | Online (free) | alliantpowder.com — covers Reloder, Power Pistol, Sport Pistol, and Bullseye families |
| QuickLOAD / QuickDESIGN | NECO | Software | Internal ballistics simulator; used by advanced reloaders and load developers — not a substitute for published data |
Best practice: Own at least one current printed manual (Lyman or Hornady are the most common starting points), then cross-reference with the free online data from Hodgdon and Vihtavuori. Never rely on forum posts, YouTube comments, or informal load sharing as primary data sources.