Handguns · Ruger

Ruger GP100

Durable magnum revolver · Backcountry sidearm · General range use

Ruger GP100
ManufacturerRuger
CategoryHandguns
Caliber.357 Magnum / .38 Special
ActionDouble-action revolver
Barrel length6.0 in
Capacity6
Weight40 oz
Introduced1985

About the Ruger GP100

The Ruger GP100 was designed in the 1980s as a hardened alternative to K-frame revolvers, using a triple-locking cylinder and a monotone frame built to absorb continuous magnum use. The investment-cast body and cushioned grip system handle recoil differently than lighter designs, which shooters notice during long sessions at the bench. Six-shot cylinders are standard, with seven-round versions on certain full-length barrel models. The factory double-action trigger is heavier than Smith & Wesson's, but the lockwork rewards professional tuning and holds up under high round counts without complaint.

Best ammo for the Ruger GP100

Live picks from Top Ammo Supply — in-stock .357 Magnum and .38 Special ammunition, sorted by price per round. Prices and stock refresh throughout the day.

.357 Magnum training & range ammo

Full metal jacket and lead loads — the cheapest way to train.

WINCHESTER AMERICAN LEVER RANGE 357 MAG AMMO 130GR FMJ BRASS CASED 50RD BOX — product photographWinchesterWINCHESTER AMERICAN LEVER RANGE 357 MAG AMMO 130GR FMJ BRASS CASED 50RD BOX 1000rd$583.19$0.583/rdWINCHESTER AMERICAN LEVER RANGE 357 MAG AMMO 130GR FMJ BRASS CASED 50RD BOX — product photographWinchesterWINCHESTER AMERICAN LEVER RANGE 357 MAG AMMO 130GR FMJ BRASS CASED 50RD BOX 250rd$161.99$0.648/rdWINCHESTER AMERICAN LEVER RANGE 357 MAG AMMO 130GR FMJ BRASS CASED 50RD BOX — product photographWinchesterWINCHESTER AMERICAN LEVER RANGE 357 MAG AMMO 130GR FMJ BRASS CASED 50RD BOX 50rd$35.63$0.713/rd

.357 Magnum defensive loads

Hollow points tested for duty and self-defense use.

CCI BLAZER 357 MAGNUM AMMO 158GR HOLLOW POINT BRASS CASED 50RD BOX — product photographCCICCI BLAZER 357 MAGNUM AMMO 158GR HOLLOW POINT BRASS CASED 50RD BOX 1000rd$691.19$0.691/rdCCI BLAZER 357 MAGNUM AMMO 158GR HOLLOW POINT BRASS CASED 50RD BOX — product photographCCICCI BLAZER 357 MAGNUM AMMO 158GR HOLLOW POINT BRASS CASED 50RD BOX 500rd$356.39$0.713/rdCCI BLAZER 357 MAGNUM AMMO 158GR HOLLOW POINT BRASS CASED 50RD BOX — product photographCCICCI BLAZER 357 MAGNUM AMMO 158GR HOLLOW POINT BRASS CASED 50RD BOX 50rd$37.79$0.756/rdDoubleTapCOLT DEFENSE 357 MAGNUM Ammo 158GR JHP BRASS CASED 20RD BOX 20rd$30.23$1.512/rd

.357 Magnum hunting loads

Soft point and expanding bullets for field use.

REMINGTON AMMUNITION 357 MAG AMMO 125GR JSP (JACKETED SOFT POINT ) BRASS CASED 50RD BOX — product photographRemingtonREMINGTON AMMUNITION 357 MAG AMMO 125GR JSP (JACKETED SOFT POINT ) BRASS CASED 50RD BOX 50rd$43.19$0.864/rd

Full selection: Browse all .357 Magnum ammunition at Top Ammo Supply →
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Specifications are approximate and can vary by variant and production year. Verify with the manufacturer before purchase. Ammunition purchase and shipping restrictions vary by jurisdiction — Top Ammo Supply enforces shipping rules at checkout.