Handloads: .300 Winchester Short Magnum

posted on May 4, 2020
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
handloadswin.jpg

Federal’s new Terminal Ascent bullet traces its origin to the Trophy Bonded Bear Claw developed by Jack Carter back in 1985, with a front lead core bonded to a solid shank of copper.

Federal upgraded the Bear Claw to the Trophy Bonded Tip in 2007 and the Edge Terminal Long Range in 2017, which featured a slender ogive capped with a Slipstream polymer tip and boattail for a high ballistic coefficient. Its tip breaks off on impact, exposing a hollow point designed to cause expansion of the bullet at velocities as low as 1400 f.p.s.

The Terminal Ascent adds a bright nickel coating and, on most of the bullets, a second AccuChannel groove around their shanks to even out shot-to-shot pressure and reduce fouling.

H4350 is a good choice for handloading the .300 WSM, and it performed well with Terminal Ascent 175-gr. bullets. Average velocity was 3001 f.p.s. fired with a 65.0-gr. charge for an extreme spread of velocity of 22 f.p.s. over nine shots.

Magnum cartridges require 10 to 20 grs. of additional propellant to drive .308" bullets just 100 to 150 f.p.s. faster. Five, three-shot groups shot with Ascent bullets varied in size from 0.82" to 1.57" and averaged 1.24" fired with a plain-Jane Winchester Model 70 Featherweight.

Federal states that Ascent bullets also expand down to 1400 f.p.s., which would make 175-gr. Ascent bullets fired from the .300 WSM deadly out to about 1,000 yds. According to a ballistic program, though, shooting that far requires compensating for 22 ft. of bullet drop with bullets hitting 2" above aim at 100 yds. Let’s go with a more realistic 500 yds. with 33" of drop, and call it good.

 

Latest

Kimber 2K11 Comp F
Kimber 2K11 Comp F

New For 2026: Kimber 2K11 Comp

Kimber increased its 2K11 product line with the addition of two models with single-port compensators.

AR-15 vs. Bullpup Rifles: Which One Is Right For You?

Though bullpup-style rifle designs have become popular elsewhere in the world, they aren't nearly as popular with the American shooting public as the ubiquitous AR-15.

2025 Year-End Gun Sales Dip Ahead Of $0 NFA Tax Stamp Enactment

Firearm sales were down in December 2025, reflecting a pause that may be attributable to enthusiasts waiting for the official start of the $0 NFA tax stamp that became official in January 2026.

Preview: Muddy DV8 Enduro Jacket

The softshell component in Muddy’s all-season DV8 camouflage layering system, the Enduro Jacket is designed for warmth, water-resistance and ruggedness while also emphasizing silent mobility.

Review: Savage 110 Trail Blazer Rifle in 22 Creedmoor

Savage’s new 110 Trail Blazer rifle offers top-shelf performance at entry-level pricing.

I Carry: Springfield Armory Hellcat Pro 9 mm Pistol in a PHLster Holster

In this week's episode of "I Carry," we have a Springfield Armory Hellcat Pro 9 mm pistol with a Meprolight MPO Pro-S red-dot sight carried in a PHLster Skeleton kydex holster.

Interests



Get the best of American Rifleman delivered to your inbox.