I finally finished my spikes build from the group buy. It's a 16" 300blk barrel. I'm using trimmed down 223 brass. I wasn't really looking for good groups yet. I'm just looking for proper feed, firing, cycling and ejection. I was using data from the new Hornady manual. All bullets were 150gr Hornady spire points(it's the only thing I have so far). All targets were at 50 yards. I started with 13.5 gr of H110 and worked up to 15.5gr. None of the loads cycled the gun 100%.
13.5 only ejected 2 out of the 5 shells. Group was 3.5" no pressure signs.
Next was 14.0gr. only 1 case failed to eject, but it would not cycle a fresh shell from the magazine. Group was a little under 4" no pressure signs.
14.5gr had two cases that failed to eject. It did feed the second shell into the chamber and locked the bolt. The third shell fed but the bolt would not lock. Looked like there was a slight bulge below the shoulder that I missed and got wedged in the chamber. Group was 2" no pressure signs.
15.0gr had one case that FTE. It fed 3 out of 5 shells into the chamber. Slightly bigger than 2" group no pressure signs. I went downrange to change some targets and let the barrel cool.
Last group was 15.5gr. This was the best so far. It FTE one case. It fed 2 out of five shells and had a 1 3/4" group with no pressure signs.
That was all of the ammo I had. I'm on the right track, I think I need more powder. I have an order for some Lilgun. I can't wait to try some of that also.
I'm also going to order some Barnes x-Tac 110gr. Alot of guys have good things to say about this bullet in 300blk.
Anyone having any success with 150gr Hornady's and H110?
13.5 only ejected 2 out of the 5 shells. Group was 3.5" no pressure signs.
Next was 14.0gr. only 1 case failed to eject, but it would not cycle a fresh shell from the magazine. Group was a little under 4" no pressure signs.
14.5gr had two cases that failed to eject. It did feed the second shell into the chamber and locked the bolt. The third shell fed but the bolt would not lock. Looked like there was a slight bulge below the shoulder that I missed and got wedged in the chamber. Group was 2" no pressure signs.
15.0gr had one case that FTE. It fed 3 out of 5 shells into the chamber. Slightly bigger than 2" group no pressure signs. I went downrange to change some targets and let the barrel cool.
Last group was 15.5gr. This was the best so far. It FTE one case. It fed 2 out of five shells and had a 1 3/4" group with no pressure signs.
That was all of the ammo I had. I'm on the right track, I think I need more powder. I have an order for some Lilgun. I can't wait to try some of that also.
I'm also going to order some Barnes x-Tac 110gr. Alot of guys have good things to say about this bullet in 300blk.
Anyone having any success with 150gr Hornady's and H110?
