243 BAR hates 105 gr, loves 75 grain with N150

SF VET

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About 30+ years ago, my now deceased Father in Law bought a Belgian Browning BAR 243. He shot it precisely 3 times. He was a BAR gunner in the Pacific, and about a decade ago, it came to me, and at some point in the past I made up some 105 gr VLD bullets, but don't recall shooting them. So a few days ago took this gorgeous BAR to the range, and my impacts were all over the place, and even key holing at 50 yards. So looked around for info on this, and did a "flag" test to see what my BAR has for a twist: it is 1/10.

So this weekend, made up some 75 gr Hornady V Max loads, over 36 grains of VHT N 150, because I have several pounds of that powder. Which requires a trickle charge because the cylinder powder grains "stack" and shear. Tedious. I want to use this miserable powder up.

Last PM, used a Site Mark 243 laser cartridge, and zeroed a new Vortex 3-9 scope for about 50 yards, to at least "get on the berm."

And my first shot at 50 yards with the new loads was an inch off the bull! I was thrilled, so moved my target out to 100 yards, and clicked my Vortex two clicks left and with a expected bullet rise at that distance, two clicks down.

And was just pleased as punch to fond the next rounds were precisely almost a single hole on the bull. Vastly different than with the 105 grain loads. Sometimes a day zeroing can be frustrating, and expensive, but today was just perfect. Now to make up a few hundred more 75gr/N150 loads. Here, the first two shots at 50 yards after my Site Mark pre-sight in.

SF VET
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I reload for the 6ARC(.243). I have a 1-7 twist on my CMMG AR 16"barrel. It is supposed to luv the heaver bullets(108gr) but, I am using the 85 grain Controlled Chaos and shooting sub-MOA at 100. I took a nice buck at 200 yards. I have a PWS in 223 Wylde that loves the 77gr .224.

I have always loved trying to find what each of my rifles like rather that what "THEY" tell me my rifle should love.
 
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