Regarding the Rapid mags I must say I've never had any problems with the cycling and I've used them in all 4 calibres. The only problems I have identified are 1) pellets can rattle both in the rifle and in your pocket and 2) because they are plastic if you drop them on to a hard surface you could well end up breaking the central core. I've done this TWICE and it is an expensive mistake to make. Mind you compared with friends who have BSA & Daystate magazines the Theoben ones are fantastic.