Are you using normal soft lead and how easy do they come out of the mold
Warrick, that is very interesting. Thanks for the info. I have been tied up over the weekend, so I was unable to do any testing. I have shot many of the new pellets, but all the testing so far was to get the skirt sealing correctly. It's interesting that you say my first pellet picture is about right. I will start my test on that one then.
I take it that is for a .20cal. Then yes your main pellet body shoud be 4.99 (give or take 0.01 depending on your rifle barrel, if you can slug the bore measure the lands and that should be your "nominal pellet size") and the driving band should be +- 0.05 bigger, so overall dia. on driving band +-5.05. Make the mold adjustable for the driving band length until you get a good "gas" seal and no stripping of the lead off the band. Aim to keep the driving band as short as possible while meeting the first two criteria. You want to see something like in my second picture of the recovered 40 grainer.
I made his to Ø5.51mm and 20gr
I will make the die's to whatever tolerance, and weight you want.
But remember these pellets are different to normal pellets!
Go back and read what Warrick said.
You need to "slug your bore", The Pic above shows the correct size for my barrel.
Note that the riffling indentations are only at the rear flair for the skirt, the drive band as Warrick calls it.
The front of the pellet runs in the inside of the bore.
If the pellets diameter is to large it looks like the above. This still works but just saps the energy of the pellet, in terms of friction.
Hi Peat, things are coming along nicely . I will send you a PM a bit later today regarding a pellet design so that we can talk numbers.
Also I will give you an idea to reduce the amount of "trimming" of the pellet you need to do from the lead flash after swagging.
I am looking forward to seeing some targets from these pellets from various rifles, it is very important for people to slug the bore of their rifle (Google search for methods) as one size will not work for all. What you could do is make an "oversize" swagged pellet and make sizing dies to customers rifle barrel requirements, however individual dies will probably be better, that and a air pump and you are self-sufficient ,