A 10-twist will shoot the 110-grain use-to-be-Fowlers just fine. I think Dave Tooley & Jeff Summers have those dies now, dunno if they are going to make bullets for sale.
I shot these 110s at 1,000 yards with a 25/06, 10-twist. Worked just fine.
Randy Robinett has new .25 dies, and will probably make bullets for sale. Believe he can make a 110-flatbase now, & in a while will have his boattail dies from Neimi.
Bettter check, but I also think Berger's 105(?) also will work with a 10-twist.
For some reason, the .25 J-4 jackets are thicker than J-4s of other calibers; just the ticket for those who want to play around on the edge.