ntsqd
Well-Known Member
We'll agree to disagree.
so I'm going to disagree with the thermal shock theory.
Yes, I am thinking you would have to use a liquid in the bore to make that happen.Exactly.....air is not quenching a barrel.
Now, back to watching ZenA heat up his barrel really quickly !!
https://www.longrangehunting.com/threads/come-at-me-bro-'-pew-pew-pew-pew.224834/
The big difference is the way he's using the CO2. I could see the concern if it was liquid but he's using in a gas state which realy isn't cold, it's cool.The above is for a one time thing. I'm talking about cumulative effects.
Ambient air is fine, CO2 that has *just* made the phase change from liquid to gas will freeze off the regulator in moderately cold temperatures. BT, DT in the middle of the Baja 1000. It warrants taking care even in hot temperatures, maybe even particularly in hot temperatures to not cool too fast.
OTOH, it's your barrel, do whatever the heck you want.
The conversion is actually in the bottle when it standing upright due to ambient air temp. You can take one bottle and put it in ice and the other at ambient hooked together and the majority of the co2 will migrate to the bottle in ice.The above is for a one time thing. I'm talking about cumulative effects.
Ambient air is fine, CO2 that has *just* made the phase change from liquid to gas will freeze off the regulator in moderately cold temperatures. BT, DT in the middle of the Baja 1000. It warrants taking care even in hot temperatures, maybe even particularly in hot temperatures to not cool too fast.
OTOH, it's your barrel, do whatever the heck you want.
The convenience of the gas is almost half or little more is liquid so the conversion to a gas state gives you more for the volume.The CO2 thing sounds like it would work fine if regulated properly. The big question I have is how much faster will it cool than high volume ambient air, which seems to work quickly. I'm going to do some temp tests as soon as I can. I'm thinking CO2 is going to be more expensive than batteries, and the rig looks like more trouble to tote around. However, if the good outweighs the bad, I'm game. I can also see where something completely inert like Argon might be better than either one, but it ain't free either.
Quenching, the process you are referring to happens when the steel is in the ~1,500F range, so it is definitely NOT happening in this case. The inside surface of the barrel quickly spreads the heat to the rest of the barrel. Gatling style machine guns can get that hot.Before you say we're uninformed have you measured the actual temperature of the barrel metal? If it is high enough, and I don't know if it is or isn't, rapidly cooling it could be making it brittle. I doubt that the temps are high enough that one time is going to matter much, but many times over the course of time could become a problem.
I have no horse in this race. I just want those who do this to do so fully informed about what they're doing.