Have to agree with you regards ther Winni subs. I must have put about 8-900 through my CZ455 with only one hangfire. No refusals to cycle either. When I swapped a box of Winnies for Elley subs with a mate I had four failures to cycle. Each rifle is different and they prefer their own ammo, some Winnies, some Elleys etc. You try a number and then stick to them.
Have a look at the thumbhole stock for the 452. I have one on my 455 and it's the Dog's Nadgers. Sits in the hand beautifully. Beautifully balanced. Got picture on my review of the rifle on here. Looks good as well as shoots well.
http://i1092.photobucket.com/albums/...ncle62/007.jpg