doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com How to tell 2 1/2" chambering from 2 3/4"?

For those unaccustomed to using these handy little measuring "sticks", there is nothing special about the fact that it is flexible, for measuring chamber lengths. That is just a common way of referring to the little stainless steel measuring scales. Flexibility in it is not a requirement for measuring chamber lengths.

SRH

You are absolutely correct Stan.
I refer to them that way because as long as I am in my everyday clothes & not my "Sunday go-to Meeting" duds I have a 6" flexible Machinist scale stuck in my left front shirt pocket. Actually, the one I am carrying at present is not of Machinist quality, but a General brand I picked up at Home Depot. It's plenty good enough to measure chamber lengths.

When I was actively employed as a Machinist it was always a Starrett with 16R graduations. One side was graduated in 32nds & 64ths with the other side having 50ths & 100rds. This General only has 32nds & 64ths with back side having a decimal equivalent chart. Browne & Sharpe was generally my preferred brand but for some reason, they did not offer this 16R graduation on their scales so I chose the Starrett.

Chamber length is pretty much a moot point in this case. 2 3/4" chamber length would not, I repeat, not, be license to put normal/common OTC loads through it. ON the other hand, 2 1/2" chamber does not preclude the use of properly assembled lighter shot loads at lower velocities with lower chamber pressure in 2 3/4" cases. RST et al probably have loads suitable for this gun.

Consider this gun an elderly gentleman due your respect. 3/4 oz loads work hunkey-dorey in 12 bore guns; I see no reason to believe they would not be a good starting point for an 1150 fps load with 7000 psi chamber pressure.

Just for grins, BV2-OQ7-CC6 = $1031. If there are no unseen/undescribed/unidentified "warts" this looks like a pretty good deal.

DDA

Understand your point, Don. But, since the OP asked for info on how to determine chamber length I (we) was addressing that particular query.

Did you not mean to say, in your last sentence, "they would not be a good starting point" ?

SRH

Does it state a shot load ? 1&1/8oz =2&1/2" .

Funny. Miller carries a 6" machinist scale from the days of his employment. I do too. My employment was lawyering and I needed the scale daily to accurately interpret land surveys and building plans. I still have mine as well, but thankfully use it now for chamber measuring...Geo

I own myself a 16 gauge Greener,the ideal Grouse gun, 26" barrels 5 3/4 lb., made in 1897. I bought it at Safari Outfitters decades and decades ago, and I've shot high brass loads through it without any problem. Except from recoil, it's a light gun and kicks your arm off with heavy loads.

16 gauge Greener

Rocketman,

Have you ever read that series of articles in DGJ in which Sherman Bell tested a large number of Damascus-barrel shotguns with heavy loads and even with overloads?

Thanks to everyone, btw, for the information and replies.