I'm pretty sure you're correct on the twist.
Makes me wonder if the 120's will stabilize. The Hornady books show loads for them, so yeah, I should try them.
I used IMR 4895 for years with that rifle and accuracy was decent at .7-.9 if I put it in an H-S stock.
In the factory unbedded stock it was a 1.5" gun with an occasional nice group.
I sold the rifle in 2009 to help finance my divorce.
In 2015 I was able to buy it back.
Anyway,
Earlier this spring I made some cases from 22-250 and needed to fire form them. Wanting to save my dwindling supply of 4895, I decided to use some 4350 and some 100gr sierra boat tails.
I'm here to tell you that 4350 works like a champ for this little cartridge. For the first time, the gun shot multiple 1/2" groups with the factory stock.
Woo, hoo!!
I'll be taking my stepson out west in two years for deer or antelope and now you've got me thinking about building a 25 Creed for him to use.
It's gonna be a fun ride prepping for it.