Are the CZ 550 Magnum Express 500 Jeffery rifles that come from the CZ custom shop good rifles? i've read they also come in 505 Gibbs, 425 Westley Richards, and 450 Rigby etc. but i like the 500 Jeffery best by far. however i've read the 500 Jeffery can be a hard round to get to feed well through rifles. So i wonder if CZ has made their rifles to be able to work well with the 500 Jeffery cartridge? thanks very much for any info because i don't have very much experience with CZ rifles, although i do own a CZ 452 22rimfire and think it's a great rifle. so that tells me something about the quality of their rifles but a big bore is obviously a lot different from a .22LR.