Re: 338 Allen Xpress, RL33 load development
Those are some great results and really gets me looking forward to trying RL33 in my 300 AX with the same 230 gr Bergers.
As far as ES goes. I think there have been ALOT of good loads passed over simply because the ES numbers are a bit higher then most would want. I have never been one to get real hung up on extremely tight ES numbers. You hear guys bragging about their single digit ES and while its certainly not a bad thing to have very low ES numbers, in my experience, even at long range shooting and hunting, as long as your ES is under 40 fps, you can get extremely good results down range as your target at 700 yards clearly shows. I would say your ES had zero effect on your rifles accuracy at that range.
Have always found that if someone wants to tighten up their groups at long range, get a good scope level, USE IT!! And sort bullets by baring surface length. Have found this to have as much if not more effect on down range group size(vertical) then even bullet weight.
Again, I like to have ES in the 20s but I am alright with 30 fps and I have seen MANY 40 fps ES loads hold well under 1 moa at 1000 yards from field shooting positions. Other variables, such as shooting position and environmental conditions generally will have MUCH more effect on your down range group size then ES ever will.
To the extreme, I have a Ruger M77MkIIVT that I rebarreled to 22-6mm AI and twisted to shoot the 75-80 gr match bullets. Extreme spread is usually in the 60 fps range but that load will print 1/4 moa at 500 yards and has shot several 1/2 moa groups at 1/2 mile......
Again, I think a lot of GOOD loads have been passed up because their ES numbers were in the 30-40 fps range.
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