I have been messing around with paper patching without success, I have two books on the subject, one by Paul Matthews "The paper Jacket" and another by Randolph S Wright " Paper Patched Bullets A Beginners Guide ".
You'd think will all this much information at hand I should be able to get results but I'm not.
My problem is this, I got a .446" dia PP mould from BACO and started patching the bullets with what I think was described as 9 lb Onion Skin paper. Two wraps of this brought the bullet Dia up to .451", the bore diameter of my barrel is .450". I think that upon chambering the round the patch is being damaged by the rifling on loading. Accuracy with this setup is poor, 3.00" at 100 meters roughly.
My current plan is to size this bullet down to .444" so that when patched the dia will be .450" making it a slip fit in the rifling. The next part of the plan is to seat the bullet well out so that upon chambering the majority of the bullet will be up the barrel, almost like breech seating but with the base of the bullet just in the case mouth.
Any comments or advice on the above would be appreciated.
Mike.

Have you tried the Larry Potter style of loading?   

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   Joe.

Maybe your rifle is at fault. Have you tried GG bullets in it?

    Joe.

PMs??   We all get cut out of the loop??

      Joe.

First, do you have 'paper ring' issues?  That is a very thin ring of paper in the chamber after the shot.  If your brass is short for the chamber, this will happen.

Second, how difficult is it to chamber your cartridge with the .451 patched bullets?  Unless you are using this load for hunting, tight in the bore is the best.  My 45-70 PP bullets are 0.4506" for a snug fit, but not hard to chamber a round.

Third, how deep in the case is the bullet seated?  I normally go with 1/8" seating depth.  I had my 40-70ss chamber modified by Shiloh to a 7 degree lead, and that allows me to shoot a PP bullets with most any seating depth based on patched diameter, from 0.398 to 0.404 patched diameter.

Fourth, what alloy are you casting?  I favor 20:1 but depending on the nose shape of your bullet slightly harder may help.

Keep on hav'n fun!
MikeT

MickB
Your idea of sizing slugs to .444 seems a good one, especially if you have a push-through sizing die. A patched bullet of .450 or a thousandth under works well for starters. As you mentioned, a bullet seated in the case about 1/8 or perhaps 1/16" should be about right. Not having used Wano, I can't comment on how well it might work or how much compression (or not) that it needs. I have had best results using Swiss 1F and 1.5F, run through a 30" drop tube with slight compression, only enough so all cases have same height powder columns. I use a card or fiber wad but plastic should also work.
From your description, I take it you are shooting dry, that is no lubrication. You might consider smearing a light coat of graphite on the exposed paper of loaded ammo or smear it on the patched bullet if you apply patches wet (wait until patches dry to apply graphite). I haven't had a chance to finish my accuracy comparisons but I seem to get fewer flyers with graphite on the patches.
You didn't mention anything about fouling mitigation but with paper patches you are more than likely going to have to wipe between shots to get good accuracy. I generally use two damp (almost wet) patches followed by one dry, making sure the chamber is dry.
One more point, if the above helps improve your groups, try an under primer wad. Use a short, thin strip of newspaper or other thin paper, insert cartridge into your priming tool, slide the paper strip under the cartridge head, seat the primer. This wad is then at the bottom of the primer pocket, between the primer and flash hole. This thin wad keeps stray powder kernels from contacting the primer which might cause inconsistent ignition shot-to-shot.
Welcome to paper patching insanity and good shooting!

Don't know if you've been there, but the Shiloh Forum has a lot of PP Shooters and Info on this subject..
I personally haven't ever tried PP yet.

Terry

Longdistance1
The bullet gets bumped-up to full groove diameter by the black powder ignition be it a paper patched or grease groove bullet.