Canadian Airgun Forum

Is there a member in Calgary who has the proper tools and know-how to crown barrels?
Please PM
Thanks

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The flaw with experience is, it causes us to forget what we were like when we didn't have any.

I don't live in Calgary, but most guys (& gals) have the proper equipment.
It is not rocket science.
You are allowed to use your imagination for smaller bore sizes. Again, it is not rocket science - turning the barrel/gun every few seconds while you rotate your 'tool' guarantees a perfectly symmetrical muzzle crown. The big one in the picture has shot a number of MOA groups at 100 meters using open IRON sights, proof, the crowning method works & is accurate. Note, a lathe can simplify the operation.



Crowning

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Best Wishes
Daryl

Whitewolf(Kim) can help you out!

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-Rick

Brocock Concept .22
3 Crosman MK 1 pistol .22

Sure but at an expensive of close to 4hr rnd trip drive for 5min of work. Not overly practical at these fuel prices.

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May the cry of the pack be with you upon your hunt

Whitewolf

Hence the reason I was asking for someone IN Calgary.

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The flaw with experience is, it causes us to forget what we were like when we didn't have any.

Daryl, can you elaborate on "crowning"? Is there anything else involved in this "crowning" method other than what is presumably the aluminum oxide sandpaper seen in the photograph? Not even a brass screw in a drill with valve grinding compound?

To recrown a muzzle a lathe is most desirable. If a lathe is not available, there are muzzle cutting tools that will do a very good job.
See, for example: http://www.brownells.com/gunsmith-tools ... r_1=MANSON PRECISION
For muzzle lapping tools, see http://www.brownells.com/items/barrel-c ... -tool.aspx

Never thought of that? I have 3' of 3/8" brass. Could make a whole batch of barrel crown lapping tools. Or even a lease tool? Lease it for $5 and have it returned to me.

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-Rick

Brocock Concept .22
3 Crosman MK 1 pistol .22

PM me.

A typical round head screw that is slotted will do the trick. Most desirable is brass due to its softness. Lapping compounds vary from tooth paste to baking soda to actual lapping compound. Paste type Automotive polish with do the same.
Yes lathe done is most desired but improvising is half the fun. Keep it simple guys. Just take things slow. Little at a time and a good 8X magnifying glass is benificial to watch for that clean shiny roll over of the rifling.
Just remember put a pellet, bass ackwards 1mm into the bbl prior to starting. Keeps all debri away from the bore and choke. Nice simple clean up, too. But then JMHO.

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May the cry of the pack be with you upon your hunt

Whitewolf

Handyguy: What kind of gun and caliber is it? The need for a perfect crown varies on the gun, and some come with crowns or muzzle ends that are just inexcusable and need the barrel cut down a bit first. The crown on most airguns isn't all that important so a simple home job using a variety of tools usually works perfectly. Can you post a close up pix of the crown along with the gun info?

I did try it myself and the accuracy went for crap. Not that it was that good to start with using my selection of pellets.
It's the Archer repeater upgrade for the QBxx in .22

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The flaw with experience is, it causes us to forget what we were like when we didn't have any.

Unless you really screwed it up I think it's something else. Like other bore damage, too big of a bore, tight spots etc. Or if using a scope it may be parallax. I attached a pix of the tool I usually use to make crowns. It's just a cheap $1 countersink tool to prep wood for flat screws, but it works great. After I check to be sure there are no burrs left behind, if so I use a scalpel or whatever to remove them. Better guns I'll sand and/or use a different tool to finish it better but it isn't important on cheap low powered airguns.
Try pushing a pellet thru the barrel with a dowel and feel for roughness and tight spots. And use good pellets, no Daisy or anything made in china. Try to use at least Crosman Premier which are usually available locally.
Let me know about that stuff and if using a scope and I'll try to help.

I have one of these, but I was under the assumption that the angle was too great.

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The flaw with experience is, it causes us to forget what we were like when we didn't have any.

A cutting tool as shown, needs perfect alignment or the chamfer will be wonky, technically speaking. If using the tool pictured and you push the chamfer tool through a denim cloth patch into the crown, this will help prevent chattering- a tip from my Dad. It works. However, a light touch is all that is needed on an air gun - pushing through the cloth might be too much pressure. Such a tip is needed when chamfering CF rifle barrels or ML rifle barrels.

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Best Wishes
Daryl

The brass screw with lapping compound is the easiest and safest way to redress the crown, air gun barrels are softer than powder burners so they don't take much effort to remove material. I use a 10-24 round head screw in my drill press and do a figure 8 with the butt. Put a cleaning patch in the end so nothing gets down the barrel while your doing it.

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When the chips are down, the buffalo is empty.