The 27 Nosler, it's official!

I have a 220 Swift, If you are running 45 grain bullet at 4200 fps. Yes you will burn the barrel out. Slow it down by using 55 grain Sierra Spitzer @ 3900 fps will increase the life of the barrel by a bunch. I feel that the 55 gr. does a better job. The load is Rem 9 1/2 primer, 39 grains of IMR 4064, with the 55Gr. Sierra Spitzer. That's per Sierra Reloading manual Copyright 1971.
 
I understand. I have built a few 22 creedmoors and the guys love them. Not pushing it hard 3550 with the 75 eldm and bug holes. The lilja 3 grooves in 22 are awesome. H4350. 43 to 44 grains. I got on the 7 practical kick which is basically a resurrected mashburn. So I thought how about a 6.5? Less coal than the nosler. I have always been a believer in a certain size hole can only use so much powder. Anyway I made up the 6.5 on the practical design with kiff,s bore rider throat. 81 of us 869 was 3360 with a 140. .001 head expansion so I dropped to 80 for 3300. The nosler uses 10 more grains for 3250 and the roy uses 90 for the same speed. Too much of a good thing.
I'd like to know how you're pushing 75s to almost 3600fps. A 243 or 6mmCreedmoor can't do that without being over pressure.
 
I have a Klinegunther in a .270 one of my favorite guns thumb hole stock birds eye maple great shooting gun . So when I wanted a new rifle went with a 28 Nosler. A 27 Nosler would be a nice gun but to close to the 28 so I don't think I'll ever have one
 
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