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

semi auto handgun
semi auto handgun

Moving to the Micro Red-Dot: An Old Dog Learns Some New Tricks

After shooting open-sighted handguns for more than 40 years, the author's aging eyes finally caught up to him, and his concealed-carry pistol now sports a red-dot optic.

Record-Setting Number of Women Receive Free Firearms Training in Michigan

Across two days of free training at Recoil Firearms in Taylor, Mich., a record-setting 2,454 women were given hands-on instruction in the safe and effective use of firearms.

7 New Pistol Suppressors for 2026

For handgunners, having a suppressor makes range trips much more comfortable, and many new suppressors have been designed for maximum compatibility across today's most popular handgun styles and chamberings.

A Victory That Ends A Gun Registry

On August 5, U.S. District Judge James Wesley Hendrix of the Northern District of Texas held that key regulatory provisions of the NFA are unconstitutional as applied to certain categories of firearms.

Criminal Clues: Tips to Avoid Appearing Like a Soft Target

You don’t have to be the hardest target, but you don’t want to be the softest. Here are some tips on how to avoid becoming a target for a criminal looking for his or her next opportunity.

Beretta A400 Solo: For the One-Gun Hunter

The new Beretta A400 Solo is designed as a no-nonsense hunting shotgun that is an entry point to the company’s premium semi-auto shotgun family.

Interests



Get the best of American Rifleman delivered to your inbox.