I have a K&P 300 prc on order myself, 22.5”. Was really tempted by the price and shorter turnaround on his buttoned barrels but there wasn’t much reviews on them and the K&P barrels are pretty well known shooters.
Nice man! I’ve been waiting to see how you liked yours, any speeds yet?
Want to report results from the first two outings with the new 300 PRC 22.5” cut rifling barrel from ES Tactical for my Desert Tech. The barrel shoots well and although not shooting for groups I have managed to get several from .5 to .3 moa so I’m happy with the purchase.
So, I’ve been playing with various powders and bullets while going through my barrel break-in routine. As of now the barrel has seen 44 rounds head down range. On the first outing I tried out some H1000 and at 76gr with 210 VLD’s the velocity was 2,666. At 78gr with the 212 ELDX and Hornady brass I saw a velocity of 2,710. Both shot well but to slow even with the expected fps increase once the barrel speeds up, so that’s it for the H1000.
I finished the first session firing five rounds, 74gr of RL26, 210VLD’s and Hornady brass. For guessing at a load this one gave me the best group shot. My CBTO measurement must have been off a bit because these rounds were jammed and not just touching the lands like I expected. Anyway, the velocity was 2,806 for this round so I’ll develop this load combo further.
On my second outing I fired one factory 212 ELDX round for a base line, velocity was 2,835. The factory offering surprised me. Next, I fired a string of rounds using the 212 ELDX, Hornady brass and 76.5 to 79gr in .5 gr increments of Retumbo. The velocity at 79gr was 2,818 so I believe going to 79.5gr would equal the factory offering. I’ll continue developing this load combination using ADG brass and see what I come up with.
To close the day out I tried some 215 Hybrids, ADG brass and RL26 ranging from 72.5 to 75gr. Both 74.5 and 75gr loads were within 3fps at 2,798, I don’t like it when that happens. Not bad velocity wise but not what I was expecting. I’ll continue with this load combination until I find pressure signs and go from there.
Based on the results so far, I’m thinking once the barrel speeds up and loads are refined I should be able to safely get velocities in the 2850 to 2900fps range with the 210VLD’s, 212ELDX and 215Hybrids, but then again we will see what really happens.