Getting too deep for my feeble mind.
My Sako .223 has a 14:1, one holer all day with 35-40s and half inch or so with 55's.
I shoot a great many p/dogs, most under 350, but, some in excess of 400, a few much further
and it seems to hit them the majority of the time with 55's @ 3100fps. Main thing that makes more
hits is how many I've been shooting within a few months. Long layoff's and I've gotta relearn.
Two things I found. 23gr AA2200 which is hard to find now. 35 & 40's made the same 3640fps.
55's with the same charge were 3100fps. V max 40's by far the most accurate of 19 various bullets
tested with this load.
The 35gr were right in the hole out to about 225yds. After that, especially beyond 250-300yds
scattered ALL OVER THE HILLSIDE. I'm talking 50 yards apart, Left, right, high low etc. No way
in the world of guessing where they might hit, exept they'd be a long way from where they were aimed. Those were the stubby bullets. Can't think now whether they were v max, or something else. Not many of that weight made so it shouldn't be hard to figure out by looking.
This is the same twist the original 222mag Sako barrel had, which is the limit of my experience.
Stimpy, I'd go with the Hornet tube, especially if the steel is harder.
Let us know what you've decided and how it works out.
Wish you well with it.
George