Barrel "Conditioning".

[manxteddy]

Yes good idea.
This can also be applied to .22 rimmy going from HV to Subs and different bullet coatings
Graham

[u.k.neil]

Yes good idea.
This can also be applied to .22 rimmy going from HV to Subs and different bullet coatings
Graham

That's what prompted me to post this..

Yesterday I was using CCI subs which were grouping very well in my CZ452, with an air rifle shooter I had just introduced to my firearm club and he had become a probationary member. I then changed to Mini-Mags and the first ten shots were all over the place like a shotgun, shots 11 and 12 closed in on the P.O.A. and the next eight keyholed.

Neil

[Pod]

Had no problems yesterday swapping between JSB Heavy and Defiants - but both were lubed with the same oil

[Acid House]

I have a similar problem.

I normally use mozzies but when on a HFT course the AAs you find in the mud never perform the same.........especially the .22s.......

[MojoCrow]

but when on a HFT course the AAs you find in the mud never perform the same.........especially the .22s.......

Ahh, you must have found the pellets my Wilkins pouch sacrificed to the Buxted tree god's.

[MojoCrow]

Some barrels are better than others and some are more sensitive than others.

Some .22 rimfire match rifles have a cycle of cleanliness/dirtiness where the rifle performs at it's best after a certain number rounds have been put through the barrel. The accuracy can start to deteriorate and then it becomes neccessary to clean the barrel and start dirtying it up again until the accuracy returns.

Some barrels are more sensitive to dirt than others (i understand that .17 HMR, .17 Mach2 & .17 Remington are quite sensitive to barrel fouling and the accuracy can deteriorate after 25-35 shots). I have read about new barrels being 'conditioned' when new by routine of firing and cleaning. This is designed to remove and roughness in the rifling.

I've had one customer who was being driven nuts by an RWS Excalibre which was stupidly accurate when operating room clean but wouldn't group for toffee once it had the slightest spec of fouling. I suggested he should try lapping the barrel but i heard months later that he sold the rifle.

[mmmaxx1]

Some barrels are better than others and some are more sensitive than others.

Some .22 rimfire match rifles have a cycle of cleanliness/dirtiness where the rifle performs at it's best after a certain number rounds have been put through the barrel. The accuracy can start to deteriorate and then it becomes neccessary to clean the barrel and start dirtying it up again until the accuracy returns.

Some barrels are more sensitive to dirt than others (i understand that .17 HMR, .17 Mach2 & .17 Remington are quite sensitive to barrel fouling and the accuracy can deteriorate after 25-35 shots). I have read about new barrels being 'conditioned' when new by routine of firing and cleaning. This is designed to remove and roughness in the rifling.

I've had one customer who was being driven nuts by an RWS Excalibre which was stupidly accurate when operating room clean but wouldn't group for toffee once it had the slightest spec of fouling. I suggested he should try lapping the barrel but i heard months later that he sold the rifle.

Good info! Thanks.

[Steyr]

Had no problems yesterday swapping between JSB Heavy and Defiants - but both were lubed with the same oil

That is unlikely to make a difference. If using the same lube was a solution it would be common practice. It is.more.lieluly that both projectiles you used are essentially compatible.

[hutchys]

Old but good thread with plenty of food for thought.

[u.k.neil]

I really cannot believe that it is nearly 16 years since I started this thread off.

frightening isn't it?


Neil

[gordon]

And It'll soon be Christmas Neil

[angrybear]

I really cannot believe that it is nearly 16 years since I started this thread off.

frightening isn't it?


Neil

That's because it isn't

9/2008 - 1/2020 = 11.3 years not even close to 16

should've gone to .....