Re: 6mm Remington for LR antelope hunting
What twist does your rifle have. It sounds like it is set up for lighter bullets so a 1-12 may be in the barrel.
It is really hard for me to recommend a V-Max for use on big game, even pronghorns which are really not that hard to penetrate. An 87 gr V-Max would probably work extremely well but I would feel even better with an 80 gr Ballistic Tip or 95 gr Ballistic Tip.
The Ballistic Tips will penetrate MUCH more consistantly then the V-Max will on game this size.
A 1-12 twist may not handle a 95 gr BT but it certainly would an 80 gr.
Again, the V-Max would probably work just fine on pronghorn but I would personally pass on them for the stouter Ballistic Tip design or go with a bullet such as the Gameking.
Range wise, the 6mm has plenty of punch to harvest pronghorn out to 600-700 yards with a well placed shot. That will probably not be an isse. Just see where the rifle will shoot to and go from there.
If you are getting 4" groups at 550 yards from a bench, I would probably consider that to be about max range in the field as you will probably not hold bench consistancy in a field shot. Thing to do is try shooting at this range using field shooting positions. That will tell you how far you can reach. Again, the 6mm will get you to 600-700 yards easy power wise, wind drift and consistancy are other factors that will limit your max range.
Wind will be a real issue with any of these bullets at +500 yards so know how much your bullet drifts.
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