Accuracy help at 600

[Wrcassell21]

I am shooting a savage model 10 FCP in 308, 1:10 twist 24", 178 amax grouping 1/4" at 100 and like crap at 600 "well over ", I'm using 178 amax, 45.5 varget, and 2.815 oal, when max chamber is 2.825. love the speed (2720 ) but would like 1/2 moa better. think I'm shooting too fast ? any suggestions

[Broz]

Just a guess here. But might help to read this.

The importance of being Solid

Jeff

[WildRose]

Originally Posted by Broz

Just a guess here. But might help to read this.

The importance of being Solid

Jeff

Ditto to Boz's suggestion.

More often than not it's going to be a shooter induced error of some type when your having your groups open up that much.

Is your rig free floated and bedded?

Are you shooting from the same position when going long vs the 100yds groups?

What scope are you shooting? Is it parallax adjustable and are you adjusting it properly for the long shots?

A sub MOA rifle and load should remain sub MOA between 100-600yds without any problem.

Last question, how much time is transpiring between shots at 100 and 600yds and are you letting it cool down completely after finishing at 100 before starting on the 600yds target.

[lrdevil]

Assuming that you're doing your part right in terms of shooting and also your reloading, maybe try backing off a couple grains and work your way back up in .5 grain increments to find minimal vertical spread, thats usually worked good for me at those ranges. Also, check your scope mount because my shooting buddy had similar problems and was so frustrated and when we check out his rifle it turned out that his base was a little loose.

[RMulhern]

Run a 'ladder' test!

[Wrcassell21]

I'm shooting from concrete slab and lead sled, using vortex viper pst , adjusting parallax, with warne steel rings and steel 20 moa base, guess will check base tightness and do ladder

[JeffP40]

How many 1/4" groups have you shot at 100? If it isn't most, then it isn't a real 1/4" load. If it is, then the advice you have been given is spot on. A ladder test at distance, (600 is good), will give you a better idea of what is going on.