What kind of accuracy were you getting with that load? Do you have a method for testing the subsonic expanding projectiles? Interested in how the slower twist is going to compare. I’m going to wait to order a Mos-Tek 8.6 barrel if it works out well with subsonic expanding projectiles.
My 6.5 twist 8.6 was much more accurate than then my torn rifled Faxon 3 twist.
I do not plan to hunt with any of the subsonic calibers...so it really doesn't matter to me...just wanted to check out manufacturers claims.
So I did a few expansion tests, just to see if they expand at all.
Just for personal information.
I had varying results.
Had many critics because it was water jugs and wet paper not ballistics gel, which only says they expand in ballistics gel...or not, or the petals break off...or not ..etc. Depending on velocity and twist rate.
Maker has 6.5 twist specific hunting subs in 338 300 gr, plus some supersonic expanding for 6.5 twist down to 165 gr.
They are twist specific, but the 350 Maker for 3 twist was accurate and did opened in the 6.5 twist.
But you'd have to test it yourself, and run the them on the high side 1050 to 1100 fps.
Too much velocity blows off the petals early or to little they open up much slower with respect to twist.
The medium makes a difference on expansion or bend.
Hornady just released their 338 ARC with an 8 twist, so their 307 gr sub should work in tbe 6.5 twist.
I just put together a 338 Spectre which is almost identical to the 338 ARC, but with a 6.5 twist.
But I ain't gonna hunt with any of them, unless it's a rabbit, might try to see if they expand on rabbit.
