I posted this in my thread about this rifle build but I feel I might get better answers in a separate thread.
Hornady 200 gr factory ammo rates at 2910 fps was running 3040,3039,3081 fps. Primers flattened.
49 grs of reloader 15 with Speer 250 hot cor, WLR primer was 2360 primers pushed and flat.
When inspecting cases after getting back home and taking measurements I noticed a ring around the casemouth on all fired cartridges reformed from 270 and the hornady factory 35 whelen. This ring mic'd at .3870 the neck below this ring is .3885-3890. I can feel said ring with thumb. Is this a tight spot from reaming the chamber?this is the First time rifle has been fired.
What might have caused this ring?
I cut the chamber myself, bolt closed 2/3 on no go but would not close completely.
Chamber was cut with elk ridge reamer rentals 35 whelen mfd by PT&G.
Brass length 2.4925 hornady and reformed 270 is 2.4795