It's possible your rifle just doesn't like that bullet or maybe keep trying to find the right combination. If the 160gr doesn't work, try something that isn't an AB. You'll find something that clicks.
I worked with two guys that were dedicated bow tie and blue oval owners. Each thought that the brand they liked was the best and everyone should buy what they liked, and we pay for it. If one of these gents would have offered to buy me their brand of choice I would have gladly driven it, but...
There can be a bad lot in any brass but most of the FC brand brass that I have used last couple of years had loose primer pockets show up after 3 maybe 4 loadings. No split necks. Might try a different brand and anneal. Hopefully you won't have any more problems.
For sale 100 new Winchester brand 41 Remington Magnum brass. $40.00 includes shipping to your door continental 48 states. Check or money order is fine. No electronic payments.
Yesterday during our youth/senior citizen antlerless season which spikes under 3 inches are legal, I got this one using my Sako Forester 308 Winchester. The load is;
Nosler 125grAB
Win Case
CCI 200 Primer
47.5grs Tac Powder
MV= 3074.2 fps
Deer was facing to the right slightly quarting to me...