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The idea of using slower MV's to get deeper penetration is soooo counterintuitive, but the data from that bullet chart is pretty convincing. Of the six bullets I took specific notes on, four have better penetration at 2,500 fps than 3,000 fps. Barnes X is very constant... penetration is practically the same from 3100 to 2200 fps.
Yeah, Ackley was pretty miffed when he couldn't shoot burros anymore. And seriously annoyed when they made him quit using .17 caliber bullets for big game!
It's odd how your tastes change. I now think 6.5x55 and 7x57 are probably two of the best all around cartridges you can find.
For now, I've put Grand Slams in the 243, as my back-up gun for pronghorn this fall. If I can get it to shoot Barnes X's well, maybe I'll drop down to about 85 grains, and shoot those later on.
As I study that chart, it seems to me that, all other factors equal, bullet construction is a very important variable. I'm just trying to figure out how important.
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