So i came across a deal on alot of factory loaded 303 ammo from FC and R-P. I got it to form the brass to 30-40 krag. For the heck of it I chambered a round in the gun and it closed perfectly. Now i know the 303 is actually.311. Could i fire this ammo in this gun and fire form all the brass?
didn't realize the pressures in the 303 where that much higher. Was thinking that they were both lower pressures due to old design and thought that maybe newer barrels like the H&R would handle it. Thanks
I have used once fired 303 British brass to form 30/40 Krag. Did this when Krag ammo was hard to get. It comes out a tad short but the case head spaces on the rim.
Could you pull the bullet and dump the powder, then resize the 303 neck, charge with an appropriate powder load and seat a .308 bullet long to hold the case against the breech and then fire form the brass?
If it was safe to fire .303 British in a 30-40 Krag we would have heard about it by now. They have coexisted for 130 years or so. I would pull the bullets and start from the beginning and use proper .308" bullets.
no one is saying it's safe to fire 303 Brit in a 30/40 Krag. It is safe to use 303 Brit brass to form 30/40 Krag brass. It's one of the easiest to do. All that's needed is 303 brass, lube and a 30/40 sizing die.
303 British is 0311 not 323. That is 8mm. Seems strange no one noticed that. I've shot 310/311 bullets in 308 barrels with no problem. Ruger's 7.62x39 had a 308 bore.
What quick said. People named calibers what they felt like. .44 mag should be 43 mag at best.The Mosin Nagant was called the 3 line rifle (30 caliber) yet darn few of them are happy with smaller than .314 or larger bullets. Where US .30 cal all use .309 or .310.
Its a mine field for the average person. But a lot of historical reading can give you some pretty good clues for navigating it. Take it all with a big grain of salt.
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