I'm having good results with the A.S.I extra power recoil spring. I've noticed less recoil and faster cycling with the .050 Gas Port Bushing. I tried the .045 GSP with bad results, for me the .045 was not so good. The ASI extra power Hammer Spring is Also a good investment. After getting the ASI trigger job,shortening the barrel by 2 in. and adding the muzzle brake/flash hider Ive had nothing but good results with low recoil,accurate,fast reliable cycling in (3 to 5 round semi auto bursts) with any ammo.
Ive come to the conclusion that the advantages of the mini-14 being a more reliable weapon out weighs the accuracy advantage of the AR. Because the mini is accurate enough and (Not that need to but if I did) I don't have the time or the gallons of solvent it takes to keep an AR functioning in a dirty grimy environment. Mini-14's has lose tolerances and is a simple design for a reason. (RELIABILITY)