I bought 2 gigantic heavy old bench rifles

Assuming the neck diameter is ok with a bullet seated....load one and fire it. That's the best chamber cast. ;) -Al
 
logangrimnar said:
Super weird. Brass that I pushed the shoulder back loaded and ejected. Two hours later it did not. Im not sure if it sprung back that much or the residual lubricant made them chamber. I scrubbed the chamber and barrel and dont see any obstructions
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Yes they absolutely will grow back or spring back. You can measure them after sized and after they sit a half hour or so using a comparator and dial indicator. Unless you annealed them before you sized them. I don’t recommend annealing unless you have an annealing machine. I use an old bench source I’ve had for years. Works good enough for me.
 
Here are the chamber casts from both. Im going to start another thread for help with the 2nd one. Thanks again everyone! 2nd rifle is almost certainly 308x1.5 Barnes
 

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Hard to tell from a picture. Might be a 30BR
They were quite popular or are quite popular with Benchrest score shooters.
A lot of clubs that shot score, club matches not sanctioned matches allowed guys to build heavy Rifles. As there was no weight limit rules in the club matches.
 
Frankr said:
Hard to tell from a picture. Might be a 30BR
They were quite popular or are quite popular with Benchrest score shooters.
A lot of clubs that shot score, club matches not sanctioned matches allowed guys to build heavy Rifles. As there was no weight limit rules in the club matches.
Click to expand...
Id be so much happier if it was but im almost certain by the measurements that is isn't
 
I believe the 308 Barnes, the larger case with that taper might be modified rimmed case to fit bolt face If it’s not 308W
 
Your two rifles appear to be late '60's early '70's restricted class BR rigs . Back then NBRSA had two Unlimited classes, restricted and unrestricted. the restricted rifles had to be shot from conventional sand bag set ups, while the unrestricted could be shot from a return to battery rest. The restricted class was discontinued in the early '70's due to lack of interest.

FWIW
Steve Kostanich
 
Steve Kostanich said:
Your two rifles appear to be late '60's early '70's restricted class BR rigs . Back then NBRSA had two Unlimited classes, restricted and unrestricted. the restricted rifles had to be shot from conventional sand bag set ups, while the unrestricted could be shot from a return to battery rest. The restricted class was discontinued in the early '70's due to lack of interest.

FWIW
Steve Kostanich
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Thank you for the information! I was thinking they were slightly older than that. Im enjoying shooting the 308 and will enjoy the 308x1.5 as soon as I find dies at a reasonable price
 
Logan,
You could actually have the 1.5 308 rechambered to a 30 BR. I think the only real difference between the two is the shoulder angle, and maybe the neck diameters. There are reasonable $ dies available for the 30 BR, and it is a very popular cartridge these days.
FWIW
Steve Kostanich
 
I am very much considering doing exactly that. It obviously wouldn't have the fast twist of the modern 30br but I have 6br brass and dies aren't much
 
Logan,
You will find the typical bullet shot in a 30 BR slow twist will shoot quite well in a 12. R.G. Robinett confirmed that for me, shooting short bullets in a 14 twist of mine that worked quit well. There is no reason to think the 12 twist will not work.
Maybe R.G will chime in here with some info.

FWIW
Steve Kostanich
 
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