Updated: Goofed on Ballistics 300 Hamr Wilson Combat AR15 range report

TLDR: this is a new wildcat round on the at-15 platform that actually carries some arse behind it and might be a legit 0-200yd pig gun.

So my dad had a hardon for 300blk for the longest time much to my chagrin. I tried to tell him it’s a great pdw but too underpowered for reliable hunting, especially on pigs. He would not take the hint. Finally he shot a pig and never found it or blood so he started to believe me. I tried to convince him into a light POF ar10 but he won’t let go of the AR-15 platform because of his want to have everything left-handed. (Yes I know they make left hand ar10 but not any that weight 6.7lbs)

So he found bill Wilson repoing this round he created called the 300 Hamr. It’s basicaly the same concept of the 300blk without the same amount of case volume restrictions and sub-par supersonic accuracy issues. They way he did this is dedicate the round to supersonic. So the case no longer has to accommodate a big long 200-220gr bullet. Nor does the twist rate of the barrel have to try and spin that much weight.

What’s really intriguing about it is that it claimed 2540fps with a 125gr Sierra Pro Hunter out of an 18” barrel. Just look at the ballistic chart. That’s a fair amount of energy out to 150yds.



So my dad jumped all over it claiming the increased speed and energy is just what the platform needed to make it a viable round. So he buys the barrel and the loading dies as well as a few Wilson factory bullets to test out. He loads up 5 different charge weights and we head to the range with his 16” Wilson match barrel and Leopoldo 2x12 vx6 hd.

We are shooting this gun mostly suppressed with his Omega and my trash panda. POI did not shift at all between the two suppressors which is always nice.

Turns out he might have turned me into a believer but we will see what it actually does on some bacon.

The attached picture is 5, 5 round groups, of the 125gr pro hunters all shot with different charge weights from as slow as 2380fps average and as high as 2560!!. I was very impressed to see the real world numbers albeit with a max load (STD of 15.4 no pressure signs).



I was most happy with the mostly sub-MOA 5 shot groups. Considering I shot all 25 rounds back to back only giving enough time to store the chrono speeds between each shot I can definitely attribute a little bit of the group sizing to me becoming tired and losing concentration. All shots were alternating so barrel heat was averaged across all groups.

All in all I think this might be a good round. But for now it’s just another wildcat.