Tight bore for magnums

[robbor]

Anyboy ever tried or know anything about possibly using one of the tight palma 30 cal bores with a large magnum cartridge?

 

[Wild_Bill]

Dont do it

Hi don't do it. We fit hundreds of Palma type barrels. They have to be under .3075" some are as tight as .306".

The limited projectiles used must be under 155gr so their is only a short bearing surface st the tighter bore allows a tight seal on the projectile.

If you use heavy projectiles the tight bore creates to much back pressure causing distortian to the jacket and projectile. Any 30cal that will be shooting 190gr+ bullet weight we have found they don't shoot well at all.

However if you only want to shoot 155gr Sierra,s then a 14 twist 307 barrel would shoot verry well but you will be limited in projectiles

Cheers Bill
Australia

 

[BountyHunter]

The new 208 Amaxs DO NOT like a tight bore for sure. Several shooters that Hornady had testing them had to change barrels to get them to shoot because of the tighter dimensions between mftrs. Harts work very well with the Amax.

BH