Interesting that you're getting an extra 300fps with the same powder charge and only 3 grains less projectile weight. What length are you loading to? I load mine reasonably long as it seems to prefer it this way maybe my pressure is down due to this.
Agree on the accuracy requirement for hares compared to deer etc. I like to go for head shots if I've got time. always worry about the whole lead thing feeding the dog and I'm too cheap to buy copper
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