The 1301 is pretty impressive.
It fed everything from light #7 1/2 Estate to Brenneke Special Forces slugs without a hiccup.
Very soft shooting, even with #00 and slugs.
Extremely fast cycling. On a 8" square steel plate at 7 yards I was doing "Bill Drills" with some #6 high brass and averaged .24 splits with my fastest split being a .20
The only downside is 8 pellet Federal FC #00 (LE133 00) was giving me 8" groups at 25 yards instead of <6" like I was expecting.
I also had to Locktite and tighten up the extended bolt release lever when it loosened off.
So far, so good.