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Post by 1shotwade on Sept 30, 2023 17:34:18 GMT -5
I've seen lately the 22lr videos talk a lot about a cold bore causing the first round to be "off" from your zero. Seems everyone has a different theroy. I'd sure like to learn more about this. My health is keeping me close to the house so I want to entertain myaelf with a short range and the 22!
Thanks
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Post by deadeer on Sept 30, 2023 21:35:53 GMT -5
Every gun/bore is unique. You'll have to test your own to find out.
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Cold bore?
Sept 30, 2023 23:27:02 GMT -5
via mobile
Post by titanium700 on Sept 30, 2023 23:27:02 GMT -5
Never had that issue…
Heard of it.
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Post by esshup on Oct 1, 2023 18:30:25 GMT -5
Long range rifle is 2 moa high from a cold, clean barrel vs a dirty cold (or warm) barrel. Once it's dirty (one shot) cold or not it doesn't matter.
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Post by stevein on Oct 1, 2023 19:15:06 GMT -5
I've seen lately the 22lr videos talk a lot about a cold bore causing the first round to be "off" from your zero. Seems everyone has a different theroy. I'd sure like to learn more about this. My health is keeping me close to the house so I want to entertain myaelf with a short range and the 22! Thanks I would hang a multiple bull target. The 50 foot NRA smallbore target would be good for this. Shoot all targets at the same range preferbably off a good solid rest. I would fire one shot with a cold bore at the sighting bull then shoot whatever bull you choose for group. Next day repeat using the same target. After 5 days you should have a five shot cold bore group. If you really want to find out note wind, light and humidity as these cange POI especially with open irons. Something like these www.amazon.com/Shooting-Paper-Targets-Official-Target/dp/B08R5KKGLL/ref=sr_1_58?crid=1MDKEURN6ET6J&keywords=NRA%2BTargets&qid=1696205432&sprefix=nra%2Btargets%2Caps%2C204&sr=8-58&th=1&psc=1That sounds like fun. You can challange yourself and maybe learn a few things about your rifle. |
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Post by 1shotwade on Oct 1, 2023 20:53:56 GMT -5
My idea, and I'm not sure is a good one, is to set up 5 targets to be shot in order. That is to say every day you fire one round on each of the targets for 5 days and that should ID your cold bore or anything else that contributes to fliers. That would be enough for a pattern should show up I would think. That may not be enough but it can always be continued.
Talk to me because I know nothing except what I have picked up off of YouTube! Thanks!
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Post by omegahunter on Oct 2, 2023 9:19:39 GMT -5
Never had that issue… Heard of it. I've never not had that issue, but I hear that if you run degreaser/alcohol patches after it has been cleaned that it will either eliminate or drastically reduce the POI shift of the clean bore. I've never tried it before. I just rip off 5 rounds on a clean barrel and then check zero. Edited to add: I was thinking that the op meant after cleaning. Re-reading seems to indicate just first round every time. I do NOT have that issue; only after a cleaning. |
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Post by HuntMeister on Oct 2, 2023 11:19:12 GMT -5
Never had a cold bore POI change but I had a 50cal ML Rifle that always sent the 1st bullet out of a clean bore 6" off all the rest that followed. Was a real pain with BP, not so bad with the Blackhorn 209 as I could let the barrel stay dirty with no corrosion issues.
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Post by omegahunter on Oct 2, 2023 11:58:56 GMT -5
The guy that taught me to shoot real BP also taught me to clean the barrel completely between shots. Three damp patches and two dry to get it spotless. Shoot one dirty reload to know where it will go if it were ever needed, but hunt clean.
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Post by esshup on Oct 2, 2023 13:07:55 GMT -5
When I was shooting competition 22LR the first few would always be off a little bit. So, the rule was shoot the first 5 into the sighter bull as fast as you could load and shoot, move to the 2nd sighter bull to to verify that POI hadn't shifted, THEN use the remaining 10 minutes to shoot 10 shots for score. We'd always clean the bore spotless after every shoot or practice. For competition, off a "little bit" could cost us points as the bullseye that we were shooting at was the size of a head of a pin. We were shooting 3 position 50' indoors. Peep sights front and back.
I did miss a coyote at 867 yds with the long range gun. I knew it'd shoot 2 moa high for the first shot, so I adjusted 17" low for the first shot on the pair that was feeding on a dead steer. Shot the first one, the 2nd one took off running. I just sat there and the 2nd one came back to see why the 1st one didn't follow and I forgot to adjust up that 17". At the shot I watched the dirt spray about 10-15 feet in front of the 2nd coyote and it didn't come back a 2nd time.
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