doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Kent bismuth pressures

I don't have any trouble thinking doc...you know my hunting dog passed too but I'm not going to use him to get sympathy.

But unlike some know it all copy and pasters I have shot bismuth shells hand loaded and factory bismuth shells out of a Damascus barreled guns and several newer guns.

No doubt in my mind. I'll assume you were trolling for a reply again. They say confession is good for the soul. How many tears did you cry to get this thread locked, when the ploy to use your deceased dog for sympathy and diversion blew up in your face like a set of badly pitted barrels plugged with mud?

How to Besmirch the memory of your dead dog



I realize that detente is supposed to be a little more snarky, but I'm still learning how it's done.

I got my doubts about him even owning a dog.

I'm willy willy good at following da dOts Doc....

....dOc sAid he knows when eYe think it huts....

.....that's his nice Christian way of say'n he thinks I'm a heAthen reee...tard....

.......Dr.Drew loves his Damascus.....

....dOc loves to talk and dream about Damascus....

....Dr. Drew told me he did nOt own or shoot any Damascus guns....

....dOc is a master on internet research and copy n pasting making dumb people think he discovered something....

....I bet ol'dOc has sore fingers from copy an pAst'n his internet ree'search.....

...dOc thinks that kicking and scream'n on the internet call'n folks liars is the proper Christian way and some how makes him look like the superior mOnkey....

....did I miss any dOtz dOc ?

....PS....dOc I wish you could see me when I paint be'twingst the lines.

Drew, I think we may have discussed the guidance on British shotshell boxes previously. Unfortunately, that guidance contains a fairly significant disconnect. We know that 3 1/4 tons, as stated on the box, is a service pressure measurement. However, we also know that 900 kg per square cm is NOT a service pressure measurement, but rather a proof pressure measurement. The British, even after converting to metric marks, continued to use proof pressures that were, in fact, lead crusher values. 850 bar, per the Birmingham Proofhouse, equates to a SAAMI proof pressure of 13,920 psi, and a service pressure of 10,730 psi. If we go by the more recent (metric) figure and increase those values based on 900kg or bar, we arrive at a service pressure which is just shy of 11,400 psi--bumping up against the 12ga SAAMI service pressure figure of 11,500 psi.

All of which leaves some doubt in my mind. I own an Alex Martin 20ga, original proof 2 1/2", 7/8 oz. It has since been reproofed and properly marked as 2 3/4", 3 1/4 tons. Should I shoot my Gamebore Pure Gold 1 oz 2 3/4" loads in that gun? Going by the 3 1/4 ton reference on the box and my gun's 3 1/4 ton proof, I would seem to be good to go. IF that gun carried the 900 bar (or kg) mark of a more recent 20ga reproof, I might do so. But given the gun's age and extremely light weight (under 5 1/2 pounds), I think I'd stick with the Gamebore Traditional Game loads made for 2 1/2" guns, service pressure 3 tons (850 kg/sq cm). Or even better, I might opt for RST 7/8 oz factory loads.

The two different service/proof pressures do leave a degree of doubt . . . but I'd sooner err on the side of caution.

As always thanks Larry...I just wish us and the Brits spoke the same language

I don't know about the pressure in these shells, but I was completely unimpressed with their killing power on Blue-winged Teal in a 20 gauge.

Drew, I think they're still trying to get even with us for the Revolution!

I am reminded why I dont visit this forum much anymore. So many ready and willing to share, a few always looking to tear down and trash talk. Ill check in again next year.

Rogers has them on sale guys