22-250 Lapua brass

[Kenny45]

Hello I`am new to this forum. Have been reading alot of posts about how good the Lapua brass is. I decided to give them a try. I bought 100 pieces and overall was pretty impressed with them. My question is that with the load that I use my 6x fired FC brass has a better group @ 100 yrds. than the new Lapua. Can I expect the group to tighten up since the Lapua brass has now been fire formed to my chamber ?

The specs. on my load that I use: 22-250 rem.
41.0 gr h380
Br 2 cci primer
case neck turned - .0125
.047 jump to lands
55 gr Nosler solid base (orange tip )bullets
The Lapua brass was FL sized and the FC brass were just neck sized and annealed.

Sorry did not have a chance to chrono loads, groups on the FC brass .265 , Lapua .457 . These were 5 shot groups
The rifle I have is a Ruger M77 Mark ll 26" heavy barrel.
Thanks for any opinions
Kenny

 

[MrMajestic]

My .223 improves dramatically post fire-forming.
The internal capacity difference may have taken you out of the node. I would chrono them to see.

 

[jonbearman]

I would concur with Mr Majestic and further warn you to back off your load a little bit and work up slow. I realize the book says 41.0 of h380 however if you have a tighter chamber the pressures could skyrocket. I relay this imfo as just a warning to make sure you dont ruin your rifle or have a catastrophic occurrence. AA2015 powder works too as well as others. You may have to experiment a bit to see what works best. I used ww748 powder in the 35.0 range for years with a 50 gr hpfb bullet and it shot under a half inch at 100 yards.

 

[sdneil]

Kenny you are running a very hot load there. Be carefull. Velocity does not always equal accuracy. Try Imr 4064 and Varget, works for me.