I think you maybe causing yourself extra headaches Jeremy. With a jacketed bullet there will always be some variation because of the lead. That’s why there is this new big interest in solid copper bullets for elr. The 285 from what I’ve heard don’t seem to work in every rifle. I am going to start doing some group testing and will ge at sparrowhawk this weekend so I might try a grouping at 1000m + with the 285. Like I said to you earlier from everything I be learnt from the 338 the 250 and 300 lapua scenar are the easiest to get to work in most rifles. Ive never weighed any of mine and only seen about a foot of verticals dispersion at 2km. Wind is the hard part.
Good luck with it. Try a 10 round load development. 7 round ladder test at .5gr increments as smaller amounts amount to stuff all in a 338 lapua case. Shoot them to same point over a chronny. Take the velocity flat point at the desired speed and pressure showing on the primers. Then load 3 and you should have single digit sd and a decent group. The 338 may take a bit of time to get shooting groups less than 1” if you normally shoot light calibers. They exaggerate everything in your shooting fundamentals. In elr a 1/4” group with a 50 FPS velocity spread will hurt vertical accuracy at 1 mile
You’d laugh at this, I was at an nzda meeting last night and called bull shit. A guy was selling a Weatherby hunting rifle in 338 win mag. With a box of 200gr Winchester factory so ammo. And a vx2 scope with 2 hold dots. Reckoned the guy who owned it shot a 8” gong at 1000m in 3 shots. He must be either the luckiest or best shot around. I’m thinking neither. But I maybe wrong. Bet it was probably about 300m as he maybe didn’t have a rangefinder.
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