Cures for Temp Sensitivity

[meestermeetch]

Hey guys, I have read a number of threaded about temp sensitivity of .22lr ammo. I intend to verify my temp sensitivity shortly via the use ammo at ambient temp, use ammo from out of a chilled cooler method.

I have heard about, but not found, a "storage box" that you put handwarmers in to keep ammo at a consistent temp. Are people using lunch boxes, pelican cases, the inserts from Grey Ops or something different to accomplish this task?

 

[68hoyt]

What I’ve read is the lunch box ( igloo playmate/lunchmate)

 

[Tree]

This holds 3 boxes and room for hand warmer on top

https://www.amazon.com/dp/B002E9GQCG/ref=twister_B07KK5TVRQ?_encoding=UTF8&psc=1

 

[MK20]

Easy cure. Only shoot at one temp

Just get something that will hold a consistent temp. I have found that a good temp controller is a mason jar full of hot water in a cooler/thermos. It will maintain a consistent temp for quite a while, and is reusable.

 

[Cuzz]

i put mine in my pocket yesterday when shooting this at about 45 degrees f.
i just realized target was only 50 yd, longer range would probably give more vert stringing.

 

[Lesloan]

i put mine in my pocket yesterday when shooting this at about 45 degrees f.
i just realized target was only 50 yd, longer range would probably give more vert stringing.

I use an empty box from 500 Lapua 6mm bullets, with a cloth pad and a coupla "Hot Hands" hand warmers. It'll hold 2 boxes of .22LR. Seems to help but I really don't have any hard data to confirm it. I just figger it can't hurt and it might help.

 

[Tree]

I personally have not seen adverse effects On 22s until you get below freezing. Only below that temp do I worry about keeping The ammo and firearm warm.

The above statement is more around accuracy vs my know temp sensitivity impact on velocity for the ammo I shoot.

 

[Lesloan]

I personally have not seen adverse effects On 22s until you get below freezing. Only below that temp do I worry about keeping The ammo and firearm warm.

The above statement is more around accuracy vs my know temp sensitivity impact on velocity for the ammo I shoot.

Seems to me that accuracy drops off measurably somewhere around 40 deg. F. Not enuff to matter for casual shooting, maybe, but for benchrest it isn't subtle. The distance between the x (actually a dot) and the 9 ring isn't a whole lot.

 

[Tree]

Seems to me that accuracy drops off measurably somewhere around 40 deg. F. Not enuff to matter for casual shooting, maybe, but for benchrest it isn't subtle. The distance between the x (actually a dot) and the 9 ring isn't a whole lot.

Makes sense I don’t shoot benchrest, mostly NRL22 style. In cold weather I just need 1-2 MOA accuracy. ?

 

[Rthur]

As mentioned handwarmers and solid data at every 10-20 degrees.
It may not be as important from 60-80 ect but it will be from 20-40.
Part has to be the lube in the barrel hardening/firming with temp loss.

R