Barrel smoke? Temperature and pressure?

[Ryan500]

Hi guys, been googleing for a while to find my answer but no dice.

Got to the range today with my first 30 reloads, 7.62x54r in a MN 1891/30.

Noticed that maybe there was a bit more smoke coming from the barrel after shooting a round, tryed 3 loads, 40.4, 40.9, 41.4 IMR 3031, with 1x brass, Winchester primers and 150gr speers. Temp was -24ish. All rounds shot well no sign of too much pressure, but before i go smash some more together I wanted to see if that extra barrel smoke meant anything.

Was also wondering what effect outside temps have on pressure, i read somewhere that lower temps will increase pressure, like today, your thoughts?


Ryan

 

[curtmg]

With very few exceptions, lower temps DECREASE pressure. A load you work up in sub-zero temps, could cause BIG problems come 35C in summer time, if it's max or over anyway.

 

[hoochie]

-24 and you had extra smoke n the barrel? you probably had extra smoke coming out of your mouth and nose when you were breathing too right? dont worry about it.

 

[RojamB21]

Unburned powder has pinkish , redish , yellowish streak coming out of barrel . Other than that I'm no man

 

[Ryan500]

-24 and you had extra smoke n the barrel? you probably had extra smoke coming out of your mouth and nose when you were breathing too right? dont worry about it.

My nagant is over 48", kind of doubt it but funny, thanks!