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Right you are, it's a 1:7 so it's suppose to be good for 62gr, indeed only 8.3" bbl. Idk if fancier 62gr+ ammo okay, it's never meant to be a "battle rifle"/sniper rifle of course lol! Thanks for your always thoughtful feedback Tony!Not speaking from experience, but I would think that it would be somewhat dependent on barrel twist (1:7 62 grain, 1:12 55 grain).
Not knowing your twist rate, but will a bullet even stabilize with a shortened 1:12 barrel?
Tony
barrel twist rates for the same barrel length have no effect on pressure. lp angle for ammo type is optimized based on barrel length for the loading and bullet weight. The 7 lp in a 53 in my experience will typically give slower rof in fa and overall weaker function and ejection but make the gun live longer due to decreased bolt energy and velocity (a good thing imho). if your gun runs reliably with the 7 lp and has acceptable rof with your ammo choice then by all means use it. Also as @kbinmt stated you both need and want more dwell time for supressor use in a 53 due to the short barrel.
