I've got four T3 lites. The only one that is at all fussy on seating depth is a 7mmRM, and then only with bergers and amaxes. The rest (223rem, 243win and 308win) don't seem to mind mag length or 20 thou jump. The 7mmRM ended up with SST 164s with 100 thou jump and will shoot all day at .3 moa if I do my bit. They all shoot factory ammo under 1 moa like every other T3 and my handloads under 0.5 moa
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