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Rimfire ammo question
Posted on 1/5/14 at 5:41 pm
Posted on 1/5/14 at 5:41 pm
This may be a dumb question, but I am having a few issues with 17 HMR ammo in cold weather. Had two that didn't fire out of 100 in 29 degree temps. Is this more common in cold weather?
5
Posted on 1/5/14 at 5:43 pm to Rustontiger43
Never had a problem.. although i didnt check temps when shooting and not sure if it was in the 20s
Posted on 1/5/14 at 5:43 pm to Rustontiger43
Probably just a coincidence
Posted on 1/5/14 at 6:18 pm to Rustontiger43
29 degrees isn't extreme as far ammo goes -- rimfire or centerfire.
However, if your gun has a lot of fouling (not the bore -- talking about a dirty gun with oil that has old powder in suspension), and//or you are using grease or oil that gets noticeably thicker at low temps, that could contribute. Any congealed oil that could affect the velocity of a striker (or hammer) would seems to be a more likely cause of failure-to-fire than "cold ammo."
Rimfires guns get pretty dirty anyway. Using too much oil, and having that oil mix with burnt & unburned powder, could easily cause failures-to-fire.
Also, don't ignore the fact that rimfire ammo (as a group) is less reliable than centerfire ammo, irrespective of temperature.
However, if your gun has a lot of fouling (not the bore -- talking about a dirty gun with oil that has old powder in suspension), and//or you are using grease or oil that gets noticeably thicker at low temps, that could contribute. Any congealed oil that could affect the velocity of a striker (or hammer) would seems to be a more likely cause of failure-to-fire than "cold ammo."
Rimfires guns get pretty dirty anyway. Using too much oil, and having that oil mix with burnt & unburned powder, could easily cause failures-to-fire.
Also, don't ignore the fact that rimfire ammo (as a group) is less reliable than centerfire ammo, irrespective of temperature.
This post was edited on 1/5/14 at 6:23 pm
Posted on 1/5/14 at 6:22 pm to Rustontiger43
quote:
This may be a dumb question, but I am having a few issues with 17 HMR ammo in cold weather. Had two that didn't fire out of 100 in 29 degree temps. Is this more common in cold weather?
I'm certain you probably tossed the rounds, but I'll ask anyway.
Did those same rounds fire in warmer weather?
I'm with KR. Probably coincidence.
This post was edited on 1/5/14 at 6:22 pm
Posted on 1/6/14 at 3:48 pm to Rustontiger43
For a rimfire, 2 misfires/100 really isn't too bad. Having said that, I agree w/ dawg23:
Sounds like you've got a good excuse to drag out your cleaning supplies.
quote:
if your gun has a lot of fouling (not the bore -- talking about a dirty gun with oil that has old powder in suspension), and//or you are using grease or oil that gets noticeably thicker at low temps, that could contribute. Any congealed oil that could affect the velocity of a striker (or hammer) would seems to be a more likely cause of failure-to-fire than "cold ammo."
Sounds like you've got a good excuse to drag out your cleaning supplies.
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