The first 7 TCU bbl's T/C offered , the ones with the soldered on front sights had a 1-10 twist, that's what I'm after.
I'll keep your 7 bbl in mind and may have a question on the length of it's throat
I never measured the twist but I shot 173 grainers with 11 gns of powder [not in any manual] for a superslow silhouette round and it stabalized. Croaked the rams right well too. I doubt it was doing over 1100 fps. You could eat your lunch while the bullet was in flight to the 200 meter mark. ;D
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