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.338 MAI Range Report
Old 07-03-2008, 12:10 AM
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Default .338 MAI Range Report

AS I said in another post, the stars aligned today and I was able to get to the range with what I think is going to be my 'go to' load for my .338 MAI. To recapitulate: I had a devil of a time getting everything to work correctly on this rifle when I first started load workup. Fnally, last range trip everything settled back down and all four bullets (180 Ballistic Silvertip, 200 Ballistic Silvertip, 210 Partition, 225 Hornady), shot produced pretty good groups. The best of the bunch - but not by too much - was the 225 Hornady. So... after doing some number crunching, I decided that I'd work on loads for that bullet. The load I settled on is:

56.21 grains of Ramshot Hunter (104.4% of case capacity) with bullet seated 0.479" deep (to center of cannelure). Average muzzle velocity was 2563 f/s, producing 3,282 ft-lbs of muzzle energy, at an estimated 50,777 PSI max chamber pressure.

I was fiddling with the "removability" of the Warne QD rings and took them off the rifle and them put them back on. I don't know about anyone else's rings, but this caused mine to be off aim by 7" low and 7" wide. Fortunately I brought plenty of ammo.

Below are three, 3-shot groups. All three are ~1" in the largest dimension. The first one is before windage adjustment. The second is after windage but before elevation adjustments. The third one is after windage and elevation adjustments. The third group was shot from a barrel too hot to handle, just to see how the rifle shot 'hot'.

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Last edited by gitano; 07-04-2008 at 11:49 AM..
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