From the above posts, looks like mixed results for the Win 333.
Can not recall any Win 333 ammo related problems with my Marlin 60s (back when I had two of them), or now with CZ452 (Varmint, Style and Scout), Savage MK2F and MKIGY bolties.
100 meter accuracy (or lack of it) is about 2.0-2.5 inch 5-shot groups, compared to 1.0 to 1.5 inches with Win Dynapoints. (Dynapoints are close to speed of sound-standard velocity, while the 333s are supersonic HV).
Win 333 works well for me plinking at 25 - 50 meters, where 1 inch groups are acceptable.