Chamber cutting a .22lr barrel.

[PineyCreek22]

I am chambering the barrel for my 22lr monoblock.  I can make the chamber so as to cause the bullet to imprint the lands and grooves.  Anyone have  experience with seating the bullet into the rifling of a 22 lr.  Any suggestions would be helpfull.  Thanks, Piney Creek

[PineyCreek22]

I am chambering the barrel on my .22lr monoblock.  I can cut the chamber so as to cause the bullet to imprint into the lands and grooves without any leade.  Has anyone had any experience with this or with any other cal. lead bullet.  Any suggestions would be appreciated.  Thanks PC

[Sprint]

Piney Creek,
 
Chambering the barrel to the 22 LR Match specs will give you the results I think you are looking for.  I'm not sure how that would work out on a Handi because of the way it would have to be forced into the rifling when the action is closed.
 
Sprint
 

[PineyCreek22]

Thanks for the response Sprint.  I have both a hunter and match configuration reamers.  As I was waiting for any suggestions I went ahead and chambered with the match reamer.  What happened was that when I put a CCI Green Tag ctg in the chamber it was difficult to get the action closed because the bullet was forced into the rifling almost to the brass.  This would not be Handi.  I then took the standard hunter reamer and carefully extended the leade untill the rifling imprints the lead about 5-7 thousandths.  The end of the hunter reamer was still almost a 1/32 from the rim cut.  The imprint of the rifling is quite even and consistant all the way around the bullet and I believe it will center  the ctg. effectively.  Time will tell.  Have you had experience with this chambering method and if so what were the results?  Thanks, Piney Creek
 
 

[gcrank1]

Ed Harris did an exhaustive article in an old Gun Digest on what makes an accurate 22LR and it came down to the chamber,;ie,, filling the all important throat with the bullet dia. and most 22 sporting rifle chambers are pretty 'generous' in dimension. He has stated that a chamber long enough that the bullet does not touch the lands will double the group size. I think you are on the right track with your approach and should have a better chance of accuracy due it. I would not lengthen it any more.
I look forward to your trials reports.
FWIW, here is a link:
http://www.grantcunningham.com/blog_files/9410e8123f44c5ffc847e46ca997a97c-971.html

[cwlongshot]

I used to have a Contender carbine with a match LR barrel. It was scary accurate and fully imprinted the rifling. Contenders have a mechanical extractor there was no issues. The handi with it's spring may need a little work to reliably extract a non fired round.

I shot about a case of the then new CCI CBlongs from that gun on squirrels. Was devistating as it was so quiet they went right back to feeding minutes after a shot instead of having to move when you shot a LR. Head shots at fifty yards where EASY!

CW

[gcrank1]

CB Longs and 50yd. head shots, so much for the bullet jump and bullet engraving being severely detrimental to practical accuracy. I recently read a short article (I think by Nickie Croyle (sp?), friend of Ed Harris) where he progressively deepened the throat of a rifle to see what the effects of long bullet jump was on cast bullets. Surprisingly to me it was minor even at several inches of freebore. I suspect that this was a nice, bullet dia. throat so gas was not getting around the bullet base yet it still had to contend with slamming into the rifling to begin spin at a pretty health velo.
As always, the proof is in the shootin'  .

[cwlongshot]

CB Longs and 50yd. head shots, so much for the bullet jump and bullet engraving being severely detrimental to practical accuracy. I recently read a short article (I think by Nickie Croyle (sp?), friend of Ed Harris) where he progressively deepened the throat of a rifle to see what the effects of long bullet jump was on cast bullets. Surprisingly to me it was minor even at several inches of freebore. I suspect that this was a nice, bullet dia. throat so gas was not getting around the bullet base yet it still had to contend with slamming into the rifling to begin spin at a pretty health velo.
As always, the proof is in the shootin'  .

NO bullet JUMP brother!!  They actually engaged the rifling!!

CW

[gcrank1]

No kidding!, I would have thought the lighter bullet wouldnt have had the length, but then you had a match chamber. I have some few CB Longs left from the 'abundant supply era', I should check them in a few chambers for engraving. I do know they were much better than the CB Shorts in a 'Boy's Rifle Match' we have here for the old Stevens Favorites, Rem No.6, etc. rifles on 22RF pistol course silhouettes. Open sights and offhand, great fun had by all.
That must have been the CWLS Secret Tree Rat Weapon.