I have one on a .308 Howa 1500. The further up the load chart, the more it worked. I noticed the most action from 155 grain bullets traveling at 2900-3000. However, if you do plan to shoot with a rear bag, you need a horizontal bar attached to the sling attachment. This will allow the proper recoil tracking. If you've shot any AR rifle, you will notice the "spring" sound from the buffer spring. It sure does tame the recoil.
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