Not sure how many hear go to sixgunner.com and read Paco Kelleys articles, but they are definately worth a read. He has mentioned using the medium and large bores with heavy cast bullets, and very light loads of fast powders.
I did a little bit of experimenting with this with the 35 whelen and 458 lott, and found that ~1gr of powder would push a bullet out there barrels with a cap gun report, yet penetrate most of a phone book. I was using universal clays, and would have had even better results with something really fast like bullseye or red dot.
I'm thinking that with the 500 Jeffrey, I could cast a pure lead bullet of 500-600 gr, turn off all but two of the driving bands, and use just enough powder to get it out of the barrel, with very little report.
I did have a few loads in the lott that didn't quite get the bullet out the barrel, made a neat metalic fooomp sound. With soft lead bullets, they are easily driven out with a cleaning rod if stuck. Use a 22 short case as a powder scoop, and a dab of dacron or cotton to keep the powder over the primer.
So, you can load your big bore to be quiter then an air rifle, and be much more effective on vermin.
I was reading over at sixgunner.com and under Paco Kelly's article links I found an article about "silent" loads. He was using very heavy bullets for caliber and fast powder too. According to the article, the loudest thing of the whole afair was the hammer falling on his 45-70 lever gun. I should have printed it out - it may be worth trying to find again.
redleg
Unfortunately something went wrong. Whether it was the duplex load (never any pressure signs of any sort) or the dacron wadding I don't know but I now have a neat circular indentation all the way around the chamber of my rifle.... All of this was worked up with regular consultation with very experienced loaders who I asked repeatedly 'Can I possibly do any damage to my rifle?' the answers were allways no...
I won't do it or anything like it again. Atkinson (or shakespeare) would say 'one day doth not a summer make' but I am once bitten twice shy. It's a pity because it was really fun to shoot a 95gr bullet out of an African type rifle.
My pal who is a gunsmith says that reloading has given him more business than anything else. I guess I helped in that statistic!
Do you have some more details on loads?
I want to try this!!!
[This message has been edited by John Ricks (edited 06-09-2001).]
Dacron wadding can do ring your chamber like that, according to some. The theory is that the wad is melted and accelerated before the bullet starts moving, slams into the base of the bullet and seals it before the pressure wave hits the base. It has been reported enough that I fear it.
I always used a tightly packed wad and never had a problem in my 308 or 416. (In some loads that was a lot of polyester batting!) I just use these for firelapping loads, and so have only shot a couple of hundred of them.
Don
I don�t use fillers. They take too much time to prepare. I always use VV-310 and once tested a 30-06 load giving 934, 942 and 922 fps for three shots barrel first up to settle powder at primer. Normal handling horisontal at bench and feeding from magasine gave 919, 916 and 917 fps. That load have no use for a filler. But I admit when it comes to really silent loads I point barrel up first.
As been said chamberringing could come from dacron melting. I also read someone using plastic shotbuffer as filler noticed it melted at very low velocity. A really big bore is caliber 12 and when I used a cast Lee slug together with a WW wad to get a silent plinker I really had that plastic wad foul the bore. Just 3 shots and the barrel didn�t clean with standard solvents. Finally thinner with toluen dissolved the plastic. Besides accuracy was bad, but the noise was low and with a full caliber lubricated slug I may give it a new try.
If I would use a filler only to hold powder to primer it would be cotton. It may burn but it doesn�t melt. But when I tested it in silent loads it was important to have the same amount in every case and packed the same, otherwise velocity varied very much. The best was just enough to hold the powder. But with that little the chance for powder to trickle forward is greater. I would say the same goes for toiletpaper.
Goran
I worked up the dacron from 1gr to 3gr, I can't tell you which was responsible. I only fired 10 rounds and as far as I can tell only one round caused the problem. Rest assured I will not be trying either again!
[This message has been edited by 1894 (edited 06-11-2001).]
1894, sorry for your bad experience with low velocity loads. But you made it unnecessarily complicated with your choice of powder. Even if SR4759 is a powder for reduced loads that light bullet together with that low charge giving unburnt powder is no surprise. Little unburnt powder is no problem, but trying to compensate low pressure with primer powder and filler certainly became a problem. A well known load of 13 gr Red Dot could have made no need for both duplex load and filler.
But for the silent loads Paul H has in mind it must be heavy lead bullets, preferable pure lead. Problem with your 9,3 mm is that LEE, Lyman and RCBS doesn�t make moulds for it. But LEE makes a round bullet mould of .375 that will be good enough. Even with Bullseye or VV-310 it might be some unburnt powder for the really low velocity, but don�t try to fix it.
Goran