Not my quote:advitiyas";p="37777 wrote:thanka art_collectro for 'limiting my options', pls dont mind.
Pls explain to me what is meant by re-crowning. How will is affect the accuracy.
"The crown of a rifle is the point at the muzzle where the rifling ends. It's the last place that the rifle has any physical influence on the bullet, and it's critical that it be perfect. The crown must be square with the bore, perfectly round and free from any defects. Even the slightest imperfection can diminish accuracy by adversely affecting the bullet when it exits the barrel. If you're going to cut off a rifle barrel, its critical that the new crown be perfect."
Easiest would be to buy a muzzle crowning tool off the 'shelf' from brownells. But for most of us in India this is too much trouble for a small thing. The Muzzle crowning tool is a specially shaped cutter which is bore specific. All you have to do is chuck it to a hand drill and wrrrrrr....carefully. Granted that most Indian Gunsmiths are actually butchers, a few of the better and respectable ones just could have the appropriate cutter. Or else the next best way would be to take it to a knowledgeable gunsmith who has a decent lathe and get it done.
I'm not too much of an Air gun person so I cant say for sure, but I assume the Airgun in the picture is Indian made. I'd noticed many Indian airguns have lined barrels- A mild steel barrel which houses a smaller and harder steel tube which is the actual accurate bore and is rifled. Often the outer barrel's bore is larger and there is an visible gap between the inner tube and the main barrel's bore. The lining is secured only in the breech and muzzle. Chop your barrel and you'll have a free floating inner bore supported only in the rear.
Some types have filler material, usually a tough plastic sleeve between the two. This also has potential of the botch-up type. Newer Air Rifles may have a normal bored through barrel and these might be the ones you can re-crown painlessly... if at all.
Regards,
cc
