There may be a cure for all the ills, but I found two 243s not worth the tinkering time and headaches. And both were 24 inch varmiters. I finally went with a Remington 243 HB. I love my Handis, but only when they will shoot. I think it's a crap shoot with some calibers, sometimes you win, sometimes you don't. I've had great luck with my 25-06, 30-30s and 45-70s. You could not give me another in 243 or 308. Good luck.
Wally