Thread: Variables affecting precision

Originally Posted by Nick-D

While br rifles are clearly very accurate, and the low recoiling nature does help remove variables, the fact remains if you have poor resolution on your output data(small sample size), you can not identify efficacy of your input variables, in this case charge weight or seating depth.

The br rifles being very accurate doesnt negate statistics and rigourous testing.

Its pretty easy to test. Just shoot a couple of said charge ladders. If the results are consistent, well maybe you are correct.

I wouldn't call a Benchrest rifle a low recoiling rifle, a 10 1/2lb BR rifle shot free recoil gets a run up to your shoulder and none of the rifles have recoil pads, lighten up the rifle even more and it gets pretty lively.

I have shot enough rounds through barrels attached to BR rifles and can tell you the aggregates at the end of 2 gun competitions, 20 x 5 shot groups give you a very good indication of what the accuracy of that rifle, barrel and load will do, I have put over 100 rounds through a barrel and still had an aggregate less than 0.400" for over 1000 rounds.

When tuning it is easy to see a group tighten up and grow larger by adjusting seating depth, all Benchrest competitors use this same method or a variation of it when they tune.
I would never try and shoot the loads Benchrest shooters use in Benchrest competition in a Factory rifle like a Sako 6PPC either.

I believe what I see and what I've experienced from multiple BR rifles and many barrels for each of those rifles, I've also taken barrels off one rifle and put them on another rifle and got the same results