Well James,
We recently had a chance to shoot the modified money mold I lapped. We're limited presently to a 200 yd range but shot a 200/300/600 yd match a week ago. Til then I'd only managed 60 shots w/ the new Browning to fire form some brass, and might have had about 2 MOA groups at best before lapping the nose section. The match was the first test for the enlarged nose. This bullet is long and heavy (535 gr) and the bore riding section has to support against the slump of wh/ you speak, so the added diameter there and an 18:1 alloy were where I'd placed my hopes. BUT, we have an 18 twist on both rifles, tho I've read that the current fad is toward 16. We had great results, much improved to sub-MOA even out to 600.