Thread: Quick 300 WSM

Funny you should about the tikka 7mm rem mags my one will shoot Hornady precision 162 eldx into one jagged hole at 100 yards but at 450 it shoots 8 inches and at 550 it can hardly hit the target . I can only think it must be becoming unstable ?

Neck turning the brass neck and shoulder junction will increase velocity a bit, as some of the factory dies set won’t resize the neck all the way down the shoulder. Also, seating deeper or touch the land will increase velocity too.

Originally Posted by hillbilly

Funny you should about the tikka 7mm rem mags my one will shoot Hornady precision 162 eldx into one jagged hole at 100 yards but at 450 it shoots 8 inches and at 550 it can hardly hit the target . I can only think it must be becoming unstable ?

Have you had a look at your Extreme spread of your loads? 50fps might not make the biggest difference at 100m but at 500m you'll definitely see it.

I’m talking a 1.8m group at 550 yards not just vertical difference it’s the precision hunter factory ammo so shouldn’t be to bad .

Originally Posted by hillbilly

I’m talking a 1.8m group at 550 yards not just vertical difference it’s the precision hunter factory ammo so shouldn’t be to bad .

I shoot that stuff through my 06 and have the same problem.

Can tell you its the SD. When I finally got to chrony mine, the SD was like 40fps.
That's the cause

Originally Posted by hillbilly

I’m talking a 1.8m group at 550 yards not just vertical difference it’s the precision hunter factory ammo so shouldn’t be to bad .

You need to check extreme spread, I shoot the 162 eldx out of my A7 with the same 9.5 twist and they shoot great out to 700+. Only difference is mine are reloads that I did myself.