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Rifling confusion

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billraby said:
.... How many rpm does a football spin at when it is thrown?

Here's a few numbers for you;

Arrow @ 200 fps 3200 rpm
fastball @ 92 mph 2200 rpm
football spiral @ 60 mph 600 rpm
 
Just one word about ml shooting. As stated above the ml patch and ball will shoot well within the parameters of a ball and functional load. No matter how heavy you load at about ahundrey yards the ball will go subsonic and the trajectory and energy will drain off quickly. People were shot and died of wounds at thee hundred yards and more, but the practical range of a ball is well less then two hundred yards.
The whole of the ml system is inefficient. The patch/ball combination at its very best is inefficient. Very large charges or very large bores can strip the rifleing. There is always going to be some blowby and the powder charge is never used effectively.
To shoot a ml one is picking up outdated inefficient technology. Shooting ml in a traditional platform is learning to deal with and work within the limitations of a primitive system.
 
If you visit a JoAnn's Fabrics, ask for 40lb pocket drill. It is used to create pants pockets. It is not in the muslin section. It is 100% cotton and mics at ~.018". As a previous poster said, make sure you wash it (to remove the sizing) at least once and throw it in the dryer before you apply the lube. I have used drill cloth for years in my flint rifles. Almost all of my recovered patches could be used again.
 
Speaking of, you can shoot thin deer skin and shoot multi shots off of one patch. I have used Chamois to test it and it shot well, I got four or five off s patch, but would loose them in the woods, it just wasn’t worth it to me.
 
My wife is a seamstress so i have an endless supply of fabrics .I think like one guy here mentioned we tend to over think the whole thing.I have a few fabrics I still have to try but so far as long as they are not to thin and have a tight weave they all have worked fine.the only thing i have noticed is you have to watch out for the new fabrics a lot of them are that strechey crap and will melt from the heat and friction.so I only use the fabric my wife gives me.
 
It's is important to use natural fibers such as 100% cotton, 100% flax linen, or very thin leather. Cotton and linen are the most available and repeatable for use in patching round ball loads. Wool isn't a good patch for round ball. And despite the quote from The Last of the Mohicans , silk is a poor choice for patching.

Any fabric that melts, avoid for any use except for cleaning patches. Just to be a bit over cautious, use fluffy cotton material for a cleaning patch.

My choice is a tightly woven cloth that is slightly thicker than the depth of the rifling and will compress to 1/2 of the difference between ball diameter and land to land bore diameter. The #40 cotton drill (utility cloth) from JoAnn's Fabrics has been my favorite for a very long time. Bot then I have rifling depth of 0.010" to 0.012" for most of my rifles.

When you go into JoAnn's with your micrometer in hand and ask for drill cloth and you get that panicked, blank look, ask for utility cloth. Drill is not often found with the pillow and mattress ticking. The canvas and denim fabrics are also in different sections. Read the labels on the bolts of denim fabric. Some denims are blends with synthetic fibers which are unsuitable for our use with a round ball. In the store, cloth has sizing that makes it feel thicker and hard to compress. Go online for a half off coupon and get a quarter yard. Wash it and then measure it. Try shooting. That quarter yard will last for nearly 200 shots. At least you now know where to find the fabric in the store.

My experience with linen patching is that the patches resist tearing and burn through better than cotton, but the very tightly woven fabric is much more expensive than cotton patching.
 
Well i just finished up shooting for the day and I am very pleased with the results.At 50 yards with 70grn FF goex and my new trial patches one was muzlen and the other pillow ticking about 17/18 thickness started out with dry patches and i was grouping 1 inch and I actually went hole for hole on two shots,then I tried with a light crisco lube and pattern held tight I did not run a cleaning patch till after about 7 shots with the lubed patches.I did have some of the dry patches get a burn through but no effect on accuracy.
 
Yep, these old guns ARE inefficient; that's why our old round ball slingers can't kill a grownup deer. :rotf: :hijacked:
 

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