Oil in the bore.

legi0n said:
Yep, I hear you and I too have read about ringed chambers and bores due to too much oil.
But when I'm hunting in less than ideal weather I'd rather have a thin layer of oil in the chamber and bore.
But that's just me :D
Click to expand...
A oily chamber can greatly increase bolt thrust.
I wouldn't worry about your barrel getting rusty while out hunting. Even after pulling a couple of dry patches through the barrel, you are still not removing 100% of the oil. At the end of a damp or rainy day's hunt, I do pull a oily patch through the barrel for the night. Then a couple of dry patched before heading out the next day. Part of my ritual that has worked for me for longer than I care to remember.
 
Cocked&Locked said:
Um, steel expands as it heats up...it contracts when it's cold..., .001 of an inch, per inch of diameter, per hundred degrees F....so unless you shoot a 45 till it's 400 degree, the bore won't expand more then 2 thou....

If you can hold the gun in your hands, it's not hot or cold enough for thermal expansion or constriction to have made a difference.
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What makes a cold bore less accurate then? There's definitely an inprovement in accuracy after the bore get to temp. Sure this is more noticeble on rifles but still valid for handguns
 
If you shot every shot with a stone cold bore, they would be just as accurate, but we don't want to wait 30 minutes between rounds ... i suspect that it has more to do with changes in stress in the barrel itself as it warms up, and with the fact that once you start shooting the barrel is much hotter in the chamber region then at the muzzle, ... This will change the harmonic somewhat i'm sure. I don't see much difference if any in pistols, but it is noticeable in most rifles, and especially where the stock bears on the barrel.
 
StoneHorse said:
There shouldn't be any oil in the bore or chamber on the first shot. Pull a couple of clean, dry patches through the bore or use a bore snake first.
On a hunting rig, the first two shots out of a cold barrel are the most important. With some rifles, the POI can change between a clean barrel and a barrel that has fired a few rounds. Barrel heating/bullets "walking" is another matter. Know your rifle.
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Bang on.

There was a good article in a hunting mag a few years back about shooting 5 round groups, but doing it over 5 range trips. IE shoot one round...then put the rifle away untill the next range trip..repeat on the same target. The idea was it would show you the repeatability and reliability of your rifle to hold the hunting shot on target. In a hunting firearm, it doens't matter if it can shoot .5 moa groups, if the group is in a different point on target every range trip....

Then there is the K31 i shoot with the swiss rifle club....after 10 rounds, it starts hitting higher...so you take two clicks off the elevation to hold POI....know your rifle.

I've not seen handguns move POI much with heating but you burn such a small powder charge that it would take 200 rounds or more to equal even 15-20 rounds with a rifle. Possibly the big single shot pistols would see it, but I doubt they fire enough rounds to notice it fast enough....maybe the silhouette shooters?
 
Hunting Rifle Ritual:

Run 3 dry patches thu bore.

Fire 3 shots at a range to ensure scope is still aligned

Leave as is for the entire season.

At end of season, clean, lube and back into the safe.

M
 
Cocked&Locked said:
Bang on.

There was a good article in a hunting mag a few years back about shooting 5 round groups, but doing it over 5 range trips. IE shoot one round...then put the rifle away untill the next range trip..repeat on the same target. The idea was it would show you the repeatability and reliability of your rifle to hold the hunting shot on target. In a hunting firearm, it doens't matter if it can shoot .5 moa groups, if the group is in a different point on target every range trip....

Then there is the K31 i shoot with the swiss rifle club....after 10 rounds, it starts hitting higher...so you take two clicks off the elevation to hold POI....know your rifle.

I've not seen handguns move POI much with heating but you burn such a small powder charge that it would take 200 rounds or more to equal even 15-20 rounds with a rifle. Possibly the big single shot pistols would see it, but I doubt they fire enough rounds to notice it fast enough....maybe the silhouette shooters?
Click to expand...

although most pistols generally have thinner barrels then rifles.
 
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