Why were they tumbling. Not heavy bullets not long distance. And to tumble at 100 yards is almost un heard off. I have shot the different vmax through more different .223 cal rifles than can be remembered and never a problem.
I shoot the hodgen extremes so temps don't matter. Varget,h4350,h1000 all have very little temp spreads. 400 seems way extreme I would be looking at the Chrono. If you are shooting 5 shot .75 groups consistently I would call that really good
Well I just got done shooting. I looked up walk back tuning. That rabit whole is in site haha. Hit good at 30 just to the left every time. Addicted I can't wait to shoot again tommorow. It is so nice having no neighbors and a big yard
after further research thats what i found to. 29 " draw @ 70#s the bow is the outback not the switch back. black gold four pin site and qad drop away rest.