Bore dimensions for the criterion barrels.

[samari46]

Can anyone tell me what bore dimension did criterion use for the barrels chambered for the 303 British cartridge?.I was thinking of getting one for my P-14? Thank You,Frank

[1hole]

I doubt anyone can tell you that within a thou or so. If you have the barrel, slug it and measure the slug; then you'll know exactly what your barrel is.

[samari46]

OK, lets try this a different way. does anyone know what the advertized bore dimensions of the Crietiron barrel in 303 British are?. I want to know before I start sinking money for molds and
H&I dies to sieze the bullets. Thank you.

[John Boy]

https://forums.gunboards.com/showthr...-bore-diameter

[Outpost75]

New Criterion barrels for the No. 4 are .303 bore and .314” groove, with rifled five grooves 1-10 LH twist, machined from gun barrel quality 4140 chrome moly steel with 0.010-short chamber for gunsmith headspacing, if you don’t have a selection of replacement bolt heads to do this in the usual way. The 4NFLD1 features a turned forward shoulder to enable indexing with a lathe. The 4NFLD-BW has a turned back shoulder with a series of breeching washers, enabling installation without a lathe. Barrels are available either Parkerized or in the white. I would expect their P14 barrels are rifled to the same specifications.

[samari46]

Thank you Outpost75 you provided exactly the info I was looking for. Didn't know about the turned forward or turned backward shoulders and breeching washers. Thanks very much. Frank

[leebuilder]

The p14 barrels are 0.314".
I've has used a few
Be well