Try mag length and see how they go. My model 7 saum shot the 168vld’s and 160tmk well at mag length/jumped, better than when I tried to seat them long. There is very little length to be gained trying to extend the mag box in the model 7, looks more hassle than it’s worth. I’m about to work up a load with the 162eldm in a barrel I just got fitted, and going to start seating them 10thou off for a ladder to find pressure, then push them deeper and see how that goes.
Cheers
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