molds
i am thinking if getting a bullet mold made in .22 i have a lee lead pot that i use for muzzle loaders. well anyways i found a company that uses cnc to make the mold blocks so you do not have to pay for a cherry so there prices were pretty reasonable.
http://www.lbtmoulds.com/moulds.shtml
the guy seemed to be very knolgable about the diffrences with air rifles vs rifles, first think he asked was twist rate and velosity so he can do some math for stabilty issues.
they will make anything that i want, so i was thinking of a bullet with a band up front and one on back like jerry slugs but instead of a wadcutter like jerry i was thinking short flat nose design.
well anyways here are the questions
what is our twist rate?
and what is the best diameter for the bands. i was thinking .217 but i do not trust my caliber.
i was thinking of making it about .5 inch long and was wondering if ther is a program to figure out the weight of the bullet if you have demintions i was hoping for low 40 grain weight
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I have been thinking about this to,and wondering why no one is trying this.Put a tite patch on cleaning rod with oil an get it to where it will pull down the bore nicely and turn with the riffling as you pull it , get a tape measure and lay it out beside rifle on table as you pull cleaning rod out ,,put black mark on cleaning rod ,to check twist,
I know that a 22 short rifle has a twist of like 1 & 20 or so . 29 grain bullet, 22 long rifle 1 & 18 . 40 grain bullet.
They used to make 22 short only rifles a long time ago for gallery shooting etc. and they where faster twist for the short stubby lighter bullets.
I have been playing with 14” T C contender in 222 Rem. With ultra light load & bullets. 29 grain lead at under 1050 fps . and it will not stabilize properly for peak accuracy. 1” at 25 yards to 3/4”, where this should be one hole group ,
The 1&12 or 14 twist the contender has in 222 is not fast enough for the short stubby 29 g. bullets, I will need to get a 40g. to 55 grain bullet mould for this project to get better accuracy. You mike thank that 1” is OK but same pistol with jacked bullets will do 1/2” at 100 yard to 1” if i do my job.
So i would imaging that the twist is really slow in these air guns so a shorter bullet would work great. a 22 cal 29 grain bullet is .359 long and that is .224 size so size it down to .221 or so and it would grow in length.
I would think that a bullet with a nice nose Dia. to ride on the bore with a nice band in the front and the back to ride in the groove but not full groove dia with a skirt in the back like a pellet or a black powder mini bullet to expand and fill the groove would work nicely .
I cast for most my powder burners so i can see geting into a project for the new condor,had it less than a week first Pcp , air gun in the future but for now just to easy to buy the pellets. besides i have to go through the learnig curve on this thing first.