Home Forums Hunting & Shooting Hunting Rifles 760 hot brass and split brass

Of course they get hot. Just had an explosion in there. Your brass from a bolt action does too.

You cannot open a bolt that fast after firing otherwise that brass would be hot too.

Try shooting an M249 with a short-sleeved shirt. Knowledge will come from that experience!

Go shoot one off in backyard, so you know

Quoting on this forum sucks on phone.

Some of you need to shoot more.

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The faster the cyclic action of your gun, the hotter the brass is when it exits the chamber.

Sitting in the chamber sucks heat from the brass. Brass from a bolt gun is cooler simply because the contact with the barrel has cooled it. Wait a second to cycle the action on your pump, and that brass will come out cool also.

ALL brass gets hot as the cartridge is fired. The flame temp is hot enough to erode and micro crack steel.

Again, the difference is how long the brass maintains contact with cool barrel steel, and how much heat is extracted from the brass before you touch it.

https://www.24hourcampfire.com/ubbthreads/ubbthreads.php/ubb/userposts/id/65925/view/posts/page/1

Where you been for the last six years?

LOL. In reading your original inquiry, we have a pretty good idea on how much you actually shoot.

It's a gas-operated auto, brass gets hot - every time.

I have probably shoot 300+ 30-06 and 300 win mag this summer and 100 243.
It has nothing to do with sitting in chamber. I am shooting on a bench. I have left bolt brass into see. Nope cold

I am doing cold barrel shooting also.

Go shoot one off in backyard you will see. Bolt is cold, nothing to do with cycle time. Gas rifles the gas is blowing back.

Go shoot and report back.

I do not have any gas operated hunting rifles. Other than 22. Got a good idea how well you know guns. 760 is a pump

Apparently reading comprehension is not a strong suit of mine this morning.

740 is semi auto. But I get if not your gun,you don't keep track of numbers.

The reason I mentioned semi auto is because they are common, and bar was mentioned

This is the answer

Is this about you talking yourself into buying another gun?! Lol!

Seriously though, I've had a couple cracked cases in my shooting past, I remember them sounding differently and impact was not the same. I might suspect your brass here, and try another brand to compare and see you've got different brass coming. Does the hot/cracked brass look any different at all? Other than the crack of course. Any "blowback" or discoloration at the neck? Please post your findings after using the different brass.

300 win mag this morning. Cold brass.

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I've got a 100 yard range. So I do a bit of shooting at times

Yes, the gas is blowing back, into a gas tube, and pushing on a piston.

WOW! Many of us shoot that in a weekend. Weekend after weekend. ETA: Heck I thought that was 300 each of 30-06 and 300 mag. Scratch that weekend crap. Make it a day.

STOP and read again what everyone is trying to tell you. Sitting in the chamber does not heat the brass. Sitting in the chamber cools the brass.

AGAIN! A gas operated gun cycles the action faster than a pump, which is faster than a bolt. The gas from a gas gun does not flow into the chamber. It pushes upon a piston which operates the action. Just exactly like the forearm operates the action on the 760.

This is true whether it is a 742, an 1100, an AR, Garand, M 14. The gas does not re-enter the chamber to re-heat the brass.

A caveat, I have never had my hands on a DI AR. I think the gas pushes against a piston which is part of the bolt. But I may be wrong about that.

All of the others listed have a gas chamber, and a piston, to drive the bolt. Many of them have an op-rod separating the piston from the bolt.

Bottom line, gas operation does nothing to make brass hotter at exit. It does something to prevent cooling of the brass before it is ejected. There is a significant difference.

I once (ONCE) shot gophers out the car window with a BA-22 while wearing shorts. ONCE!!! My teen-aged inner thigh was branded by Remington.......

I'm thinking that 55+gn of smokeless might-could heat up a piece of brass pretty good. I know that ~25-27gn of powder, an AR-15, and a naive prairie-dog town can make for some mighty hot 223 brass.