Thanks
I see you have the choate stock. That is the stock I am looking at from CDI Gunworks. How do you like it?
The 9 twist is also the same as I will be getting. Thought it would work well especially with the longer barrel.
Your uses sound alot like mine how do you feel the 30 inch barrel handles
Speeds look good and I would suspect it will speed up a little after break-in.
The 1:9 twist rate is what I decided on after talking with the guy at McGowen that has worked there forever. Called expecting an admin person, got a shooter & machinist who was willing to talk to me for over 15 minutes. I had caliber questions and all. I really wanted to go with 7-300wm but had to throw that out due to my requirement of wanting to be able to buy ammo if I didn't have time to reload...that is what really put the 300PRC on top.
The 30 inch barrel is a little bit front heavy for me but I had them leave it full diameter all the way down to the muzzle basically. So it is 1.2 minus the thread depth in diameter all the way down. (read: heavy - but that is what I wanted) I had it threaded and put a ZROdelta gen1 .338 brake on it (found it on sale since the gen2's are out) I'm going to fill the handle of the Choate stock with lead shot to give it a little more weight in the back and then I think it will be perfect. BTW: the ZROdelta break works AWESOME!!! When I control the recoil correctly I can see the impacts even at 100 yards. At 500 yards it is super easy. (yes I was shooting steel at 500 during break-in...but it was a big steel plate)
The Choate ultimate sniper stock, I got hooked on them 8-10 years ago after reading about a guy in Europe that was winning F-class matches shooting one. I figured F-class guys are picky and you can't win shooting with substandard gear. We own 4 of them right now and two of them shoot in the .3 range. I have a bone stock Rem700 SPS Varminter in .308 that shoots .5moa all day long with Federal 168 & PPU Match line ammo. Two use blind / ADL mags as repeaters & two of them are blocked off as single shot rifles. This works with my shooting style and not having a mag on the bottom actually works much better for odd positions when needed. We do hunt with them from time to time. I love the simplicity and flexibility of the Choate. Like I already said the handle can store a little bit or be used to fill with lead shot to balance the rifle to your liking. Even the heaviest of barrels will fit in the barrel channel. The carry straps are on the sides so you don't have a scope digging or trigger guard digging in your back when slung, again very nice. The last but not least is the rail up front that allows you to quickly put a bi-pod on or take it off and use bags. I have 3 quick attach pieces for different size bi-pods. I'm also making an attachment to quick attach a bag slide. The ultimate sniper has extremely aggressive texture, but it can be sanded down or off if desired. Personally I like it as is. The handle is quite fat compared to most, great for big hands or for a grip that uses the back where the safety goes as a thumb shelf. IF you want the same features but a skinnier grip, black color, flat forend & very little texture then go with the Choate Varmint stock. They hold paint pretty good, my son painted his and you can do cool things like us a glob of JBweld to create a thumb shelf (it might be ugly but it works)
I know the stock only plays a part in accuracy but you can see even during break in the groups were good. After the first 10 shots I only cleaned ever other shot, each time you can see the holes are touching. Next time out its 5 shot groups between cleanings for the last 30 in my break in procedure.
So far for using breaks I can say with certainty that the JP Eliminator works great for reducing recoil and is the best for staying on target because of how it manages the gas. The ZROdelta brake reduces recoil even more but is just a hair less effective at staying on target but more friendly to the bench next to you. The 30 inch barrel seems to help keep it on target when I shoot square from behind it though.
https://precisionrifleblog.com/ has a bunch of reading on brakes if you are so inclined, it was the basis of my decision.
That's my experience so far. Hope it helps, sorry for the novel length post.