The 600lbs gorilla

[ricsmall]

About the only thing you can do is test them yourself. I think out to 800-1000 in good conditions, the difference would be negligible,assuming your rifle shoots both projos accurately.With wind, change in altitude, or other external factors,all you can do is test. And youre right, I have often thought about this. Ive got couple hundred 123 amax factory loads, and plan to try some sierra 107's or lap. 108's. Havent decided yet. Keep us posted if you get to it.