We just concluded another one of our match ammo comparison tests, this time we tested 300 Win Mag ammo. This is only the first phase of the testing and we’ll be conducting phase two in the near future. For this first phase we started with the venerable 190gr match ammo and will branch out from there with future phases. You can read the full report here:

Sniper Central .300 Win Mag Match Ammo Comparison Test

Our next comparison test scheduled for later this year will be of 6.5 Creedmoor ammo, so be paying attention for that one. In the mean time, take a look at the 300 Win Mag test or any of our other tests here:

Sniper Central Match Ammo Comparison Tests

Sniper Central 2019

2 Comments

Marty Fick

Mel,
Thanks for doing this test on 300 win mag ammo. As you know, I bought a Ruger Hawkeye LRT in 300 wm this past winter. I saw the extreme spread results on the Federal GMM 190 grain SBTHP and I had similar results shooting my rifle. I shot from 2 different lots of ammo and one lot gave me e.s. of 25 fps and another lot gave me 50 fps e.s. I thought that was odd for Federal because I have had tighter results with their match ammo in 260 Remington, 308, and 6.5 Creedmoor. I emailed Federal about the 300 wm results and they got back to me and stated that they try to hold the e.s. tolerances on the magnum ammo to 40 fps e.s. Some of your readers may not be aware of how extreme spread can affect group sizes. A 40 fps e.s. can give you a vertical shot string where the group will open up to 2″ at 500 yards, 6″ at 800 yards, and 10″ at 1,000 yards just from the velocity differences. When we shoot really tight groups with factory ammo, we are fortunate to have picked cartridges out of the box that had very close muzzle velocities. When we get those “random fliers” (especially vertical) where we didn’t do anything wrong, it is probably due to a velocity deviation. I look forward to your 300 wm tests of the heavier bullets in the future. Thanks again and keep up the good work.

Marty from Indiana

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