New to 300 PRC with a new Sig Cross here in 2025! Only about 40 rounds into the new rifle and it's meeting all expectations so far for where I hoped it would as I continue fine tune my first load work up. Also working on improving my reloading skills with it. Strange, I thought there would be more forum discussion for the 300 PRC but maybe I just need to look harder. For the first time with any caliber I'm also doing a "never buy any rounds" thing with it and it's looking great already to be on this path.
Current Load: Sig Cross 24" barrel
H1000; new Lapua Brass; BR CCI primers; Berger Hybrid Target 215 Grain bullets
- Currently settled on '81.20' grain of power; with 2.915" Ojive; 2.260" neck and 3.700" COAL.
- Last read of 10 consecutive shots yields a 11.1 STD (Spread of 33.9 ) and 2,926 fps average
- Grouping right at 1 MOA with 10 shots (1/2 MOA with fewer shots so the shooter does the best that he can here and the variation increases with more rounds of course)
- I have installed an Arken 35x scope so, seeing the target very clearly at 100 yards is of course like it's a foot from the barrel.
- All internal necks dry lubed and run through a 30 cal carbide mandrel for new brass
- So far, all fired rounds so far with RCBS Charge Master 1600 only with its associated power accuracy
- As far as I can tell, I have not seen any signs of tight bolt or case issues with this rifle and the 81.2 change load.
- I must give credit to the Sig Cross; recoil somehow feels right at or a little less that my 308 with this rifle but it could also be too just feeling less in my shoulder with age..
Questions/Comments to anyone familiar here: (In short; how to push for better SD and tighter groups of course?)
- First time use with H1000 powder and it seems darn good; hard to know what powder could be 'better'? I have a 30 cal can but not used yet until I have my initial work up complete and proven repeatable.
- All my future rounds will be using the FX-120i scale for the better accuracy (just got it) so TBD on how that improves STD or not yet...?
- I'm sticking to the MAX 3.700" COL allowed so the rounds fit in the pricy rifle mags. These Berger Hybrid bullets hit my lands at about 3.745" so hard to push beyond 3.700" here with little interest to work up single load rounds. Too bad it's that far off so you kind of have to tune loads right at MAX COL which feels like you leave accuracy on the table.
- Still on 1st round with new brass.. No experience with neck turning and it seems painful so we'll see if I get into that later.
- COST of ownership here (just bullet material) which is interesting:
- $3.05 each first use; $1.35 each new reload which really shows how pricy the brass is
