re-crowning

SignGuy

SignGuy

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does re-crowning help with accuracy ? was thinking of getting this done to my 303 as it is cheap and have been told it will do alot towards making it accurate any truth to it ? is it gonna be worth the effort ?
oh and i often hear the term Target crown is that any differnce to a normal crown or is it just one of them fancy "catch Phrases"
 
In my opinion, not a good idea

SignGuy said:
does re-crowning help with accuracy ? was thinking of getting this done to my 303 as it is cheap and have been told it will do alot towards making it accurate any truth to it ? is it gonna be worth the effort ?
oh and i often hear the term Target crown is that any differnce to a normal crown or is it just one of them fancy "catch Phrases"
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Hey Sign Guy

I have seen gunsmiths do miracles with rifles and I will not say that it is not possible, but, in my opinion as a garage gunsmith, the best way to accurize a rifle (accurize is not really a word but it is often used) is by careful assembly of its standard or original parts. The minute you start modifying the original parts of a rifle, you may never again get it back to its original form.

That said, I have seen re-crowning work to a certain extent, but it is important that it not be excessive and does not change the overall dimensions of the rifle (but I still do not recommend it).

Regards
Robert
 
SignGuy:

If the crown is damaged, it's going to affect accuracy. When the bullet leaves the end if the barrel (the "crown"), there's a lot of high-pressure gas behind it. It's important that this column of gas disperses uniformly during the interval when the base of the bullet is at, or just past, the crown.

Of course, it's a matter of degree. A few small scratches on an SKS crown aren't going to produce a noticeable reduction in accuracy. Large gouges on the crown of any rifle probably will affect accuracy.

Target crowns are cut differently - the following website seems to offer a pretty good description:

http://riflestocks.tripod.com/targetcrown.html

Since you are in Ottawa, I recommend visiting Gunco and talking to Jason. He can cut most any type of crown, and he can advise you on whether it will give you any real benefit.
 
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rlg said:
Hey Sign Guy

in my opinion as a garage gunsmith, the best way to accurize a rifle (accurize is not really a word but it is often used) is by careful assembly of its standard or original parts.
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On a second thought, you may want to consider other opinions on the matter. Maybe you should post this in the GUNSMITHING section of this forum. I am sure that there are many other opinions on the matter.

Regards
Robert
 
Crown

It all depends on the actual state of your crowning; if the crown is deformed near the bullet exit hole by serious pitting, gouging, wrong use of a cleaning rod, etc... your rifle's accuracy will surely benefit from a new crowning.
if it is clean, I would look after other causes of inaccuracy such as a badly regulated contact/pressure point at the end of the forearm, loose kingscrew, missing spacer on the kingscrew, loose buttstock, etc...
PP.
 
Plinker is right, Gunco is the place to ask

Plinker said:
Since you are in Ottawa, I recommend visiting Gunco and talking to Jason. he can cut most any type of crown, and he can advise you on whether it will give you any real benefit.
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Me again Sign Guy,

Plinker has a very good suggestion. Gunco is one of the best places out there for honest and straightforward information.

In case you do not have it, here is the address and phone number.

Gunco Jason Spencer Reg'd Gunsmith
613-224-6266
190 Colonnade Road,
Nepean, ON K2E 7J5

Regards
Robert
 
rlg said:
Me again Sign Guy,

Plinker has a very good suggestion. Gunco is one of the best places out there for honest and straightforward information.

In case you do not have it, here is the address and phone number.

Gunco Jason Spencer Reg'd Gunsmith
613-224-6266
190 Colonnade Road,
Nepean, ON K2E 7J5

Regards
Robert
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yeah i klnow jason beene in his shop a few times bought the wife her fiorst shottie fromm him he is the only one i would get to do it and his dog is cute lol
 
MPI said:
How does one do this? Going muzzle to breach?:confused:
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if your useing a brush or solid jag the attachment gos completly out of the muzzle from the breach end and knicks the crown on its way back in
 
Hows the rifle shoot now? Have you "tuned" it to a specific ammo - bullet weight etc? I'm assuming its a #4 sporter, with a scope?
If all the above is true, then the rifle could get down to 1-1.5 moa at 100y, assuming you're doing your part..
Otherwise, best to look at other matters first, before spending 35 large on a recrown. I'd look at the bedding before crowning - given the rifle was "sported".... Most sported #4's seem to benefit from slight pressure at the forend, rather than free float.
 
using aluminum or other plastic coated cleaning rods will prevent damage.

I recrown any bubba rifles that the crown looks like crap, you know the ones that you can see the hacksaw marks, and the barrel is not cut flush. I like a nice recesed crown and at 11deg, finished with some very fine emory cloth. (all done on the lathe of course)

Seems to work fairly well
 
woodchopper said:
using aluminum or other plastic coated cleaning rods will prevent damage.

I recrown any bubba rifles that the crown looks like crap, you know the ones that you can see the hacksaw marks, and the barrel is not cut flush. I like a nice recesed crown and at 11deg, finished with some very fine emory cloth. (all done on the lathe of course)

Seems to work fairly well
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i was looking at getting the step crown instead of the 11 degree looks meaner LOL
 
SignGuy said:
i was looking at getting the step crown instead of the 11 degree looks meaner LOL
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that was what I did on the last one it was a No4 Bubba and I did a step or recesed crown, a little more protection from any damage when throwing the gun behind the truck seat.
 
there are a number of questions to consider before relying a new crowning for accuracy. I don't know if you have a full wood stock or has it been sporterized. Is the barrel being touched by any of the wood stock or barrel bands, this will affect the vibratin of the barrel as the bullet passes down
and ont muzzle. Is rifle glass bedded or not,is head spacing OK, last but not least
try serveral types and weights of bullet and log your targets,set what it likes.
If ,after checking all the afor mentioned details ,the check crown.
 
In service, Lee Enfields were usually cleaned with pull throughs. Cord wear was a recognized problem, and rifles may be marked with a stamp indicating observed muzzle damage.
Recrowning can contribute to improved accuracy. This is why many MNs are counterbored at the muzzle - this is an extreme example of recrowning.
There is no definitive rule about what type of crown produces the best results from an accuracy standpoint. A lot of benchrest rifles have the 11 degree crown. Why 11, not 10 or 12? No reason, 11 isn't magic. To cut an 11 degree crown requires very careful setup in the lathe. This may account for the excellent results which may be obtained. A recessed 90 degree crown is easier to do, and works just fine. Factory style radiused crowns obviously work, as does the bevelled crown used on No. 4 rifles.
Examine the muzzle carefully. If the end of the rifling is not sharp, distinct and undamaged, recrowning might well improve things.
 
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