7.7x57

[brybenn]

Anyone use this oddity? I came into a rifle with ammo and dies

 

[Potashminer]

I had to look that one up - apparently uses the .318" diameter bullets - I had got some from Woodleigh - I am not sure what is available any more?? You likely want to slug your bore to confirm that. On-line, just read of a guy who cast his chamber and seems to think the brass is 8x57 Rimmed, or similar.

 

[brybenn]

Its rimless bottleneck built on a 1895 mauser chileno deutsche waffen und munitionspabriken berlin sitting in a ramline synthetic stock. The ammo i got with it has had the headstamps ground to remove the original stamping and others painted over

 

[hoytcanon]

If it is a .318" bore, it wouldn't take much to Swage .32 cal .321" bullets down for it... can't see why it wouldn't be an excellent hunting cartridge... the one pictured below has proven to be a highly useful game getter.

 

[brybenn]

The hand load notes 180gr rn and pt. Imr 4064 45grs and a 150gr hornady sp 48grs 4064 nobel 103

Im not sure exactly what he was shooting but did hornaday make a 150gr sp in .318"?
If he was using a common .308 i doubt the dies would be marked as 7.7 but im not sure

 

[brybenn]

The name stamp in a nice touch

 

[Dosing]

I would have thought 310-311. As in 303brit

 

[conor_90]

You said you have ammo; can’t you just pull a bullet and measure it’s diameter?

7.7 in the nomenclature of Japanese cartridges refers to a “303” bullet as per above. Maybe a one off wildcat to get rid of 303 projectiles and x57 brass?

 

[brybenn]

I havent had time to replace the batteries in my calipers. Work and parenting and pulling cars outta ditches are taking most of my time right now.
I plan on testing this rifle and several others this weekend to better assess their worth

 

[Potashminer]

brybenn - really should slug that bore to find what bullets to buy. CGN'r WhyNot and I have both slugged a "weird to us" BSA barrel marked as 270 Win. It is .270" from face of land to face of land (the "bore"). Is a proper 270 Win chamber. But is .282" groove diameter - a "correct" 270 Win barrel should be .277" or so for groove diameter. It shoots roughly 4 inch "groups" at 25 yards. Perhaps coincidence, but apparently BSA might have been one of the makers of the much earlier P13 in "276 Enfield" - the P13 has the same barrel tenon thread as this converted M1917 by BSA. 276 Enfield, I have been led to believe, happened to have a .270" bore and .282" grooves. So can not really rely on what it "should be" - likely want to slug that barrel and know what it "is".

 

[brybenn]

Ya ill get to sluggin. I got a few to do. Chamber casts as well.

 

[bjmurata]

You said you have ammo; can’t you just pull a bullet and measure it’s diameter?

About the easiest way to be sure, I would normally assume .311-.313 diameter bullets because of the 7.7 x57 designation but we won't know until brybenn gets a chance to actually check with his caliper.

 

[brybenn]

Bullet diameter is 7.92 mm (0.312 in) with the hornady 150gr sp

 

[brybenn]

So its basically a 303/57. 24" barrel






Im assuming the action maybe worth salvaging for someone. Would a value of $300 be over priced. It does have dies but theyre rusty. I do have brass

 

[conor_90]

A 95 action doesn’t have very much value; look at all the complete small ring sporters going for ~300 from dealers. Add in the weird chambering and what looks like crude bolt modification. It might be worth something to a tinkerer

The most valuable components are probably the mount and scope. You might be able to sell the stock or you could put it on an intersurplus rifle.

You could sell it as an oddball to someone who likes tinkering for 300 I bet. If the dies no longer function this might be difficult