Frank, you’re exactly correct. I shoot several target rifles, mostly 52D’s although I have 40X’s and several other well known brands. I even had a couple of custom rifles at one time. Eventually, I sold the custom rifles due to changes at our local clubs getting away from using them.
I been shooting target rifles since 2007, what I have found is, they require a lot more ammo testing, and a lot more practice to achieve the results you’re looking for. It took me a few years to figure out the know how in order to be competitive in BR competition. Now when I go to sanctioned BR matches with on of my 52D’s I don’t feel like I am at a huge disadvantage equipment wise. My equipment is rather simple, rifle, bipod. rear bag, range bag and ammo. I have shot multiple 250’s and a few 750’s in IR matches and a few 2200-2400’s in ARA, but I confess my ARA scores are lack luster at times, usually around a 2100 or so agg.
All I can tell you is to hang with it, if you feel your not getting any better with what your using, look for a different and hopefully better rifle. I lucked out on the first two 52’s I bought. The first was a 52D, my scores picked up dramatically over the rifles I was using, Kimber 82G and an H&R M12. My second one was a 52E another good shooting rifle. Bought a couple of other 52D’s and while they shot good, they were not good enough. Later I bought another 52D. It was an unmarked CMP rifle. It was well worn, butt ugly stock, but it was too cheap to pass on. It shoots fantastic. A couple of years ago, I shot a 1499-114X at Piney Hill during a special money match.
I have had a couple of 52C’s and they acted like what your talking about, great one trip, no so well the next. I blame it on the barrel band. It’s adjustable, but finicky. If I had another one, I would take it off and try it. JMO