I have an A-bolt and have had no probs with feeding. Ive got the bullets loaded out almost as far as possible and still fit in theclip and its always smooth. This has been with Nos parts. and I have loaded but not shot some 85grn Sierra hps and they also work fine with no probs. The original factory ammo I used was the 100grn power pts and they worked fine. I bought them just to have something to shoot waiting for my dies and for mt brass.

Im not sure if theres much difference between the A-bolt and Winchester but Ive had no issues.