Hi all,

I just got a SS Super Blackhawk .44 and want to slug the cylinder throats and bore, to see if I need to ream the throats and/or fire lap the bore if there is a constriction.

Never done this before and this is my first revolver (woohoo, love this thing!!) so just wondering if WW are ok for slugging or are they too hard?

I guess I should ask if what I intend doing is the correct procedure..might save some tears! So I make an elongated slug, like 3” long or so and belt this into the front of each cylinder to a depth of about 1”, then measure with micrometer for a throat measurement? Same thing done at end of muzzle for a bore reading?

Thing Im stuck on is how do you know if there is a bore restriction? If you drive a slug through the muzzle to the breech, the muzzle is usually the smallest constriction isn’t it...or do mid bore restrictions get smaller than that?

Wish I could spring for a set of pin gauges but low tech will have to do!

Thanks, any input appreciated.

Follow the procedures entailed in this article and you cant go wrong.

http://www.gunblast.com/FerminGarza-Firelapping.htm

You could probably call a machine shop and ask to use their pins for a couple of minutes while standing there. Cant hurt to ask...

How does it shoot? If it shoots good don't mess with it!

Don't use wheel weights, to hard of an alloy. You want pure lead, soft. Pure lead egg sinkers or lead ball work great. Run a patch of oil down the bore, set the lead ball or sinker on the end of the barrel and use a hammer and tap it into the barrel. It will flatten out and kind of mushroom. Then use a wooded dowel or a rod of some sort to just tap it through the bore. Go slowly and feel the resistance. You can tell when/if you hit a restriction. It will probably be .429. As far as your cylinders just see if you can push a .430 bullet through the cylinder. If you can then great, your good to go, .429 bore + .430 cylinder throats = just right. Shoot .430 boolits. Here are a couple pics of when I did my 45 Colt Redhawk and 454 casull levergun. The RH is .451 and the levergun is .452.

At rite dare is a boy who is thinkin out side the box

Well done

So what if my jacketed .410 bullits won't slide into my cylander? Should they?

Thanks for the feedback guys, really appreciate it. Going to pick up some fishing weights and give this a go!

It just means your cylinders throats are smaller than .410. How does it shoot? If it works don't fix it

Typically with jacketed the bullet is the same size as bore diameter. With cast you want .001 larger than bore diameter and cylinder throats .0005 larger than boolit diameter. So my 45 Colt bore is .451, I want to shoot .452 cast. Cylinder throats were .451-.4515, fine for jacketed but I want to shoot heavy cast so I reamed the cylinder throats to .4525 Now the .452 boolits don't get swaged down to throat diameter. This causes leading and poor accuracy.

There is a really good video on Youtube.

http://www.youtube.com/watch?v=KuNoo4m6jso