I have been having good success with powder coating small batches of heeled cast projectiles by splitting the rings created when cutting the brass and covering the heeled portion prior to baking .. it does require some handeling .. removing the paint strip on the heeled portion ( with a sharp edge ) where the split in the case is located.
The powder does not stick the the brass on the healed portion untill the flow stage .. the rings are longer than the heeled portion and easily pull away from the cast with a pair of needle nose .. Powder dust will get behind the brass here and there .. but is easily removed with one pass of an emery board ..
This very light powder residue would most likely assist a good heeled crimp, but ●●● I am wondering if there is something that would not draw powder under the brass, yet would keep stray powder from sticking to the heeled base under the brass ring during the baking .. ●●●
This is not for a large project .. I wish to create about 50 .41lc powder coated projectiles ..
So far I have 32 completed ptojectiles, but do not have enough rings, and removing the flow from the exterior and underside of the used brass ring to reuse them is a bother .. with no " established powder blocker " I will slice rings from 306 brass .. but that is a bother also ... ( may wish to make more than 50 )
Additional info ..
Powder is Eastwood Ford Light Blue ..
I will be sizing with a 40S&W Lee sizing die ( 4.01 ) die was tight .400 so I took it out to .402 .. crimping with old West 41lc crimper .. have not decided on case length .. something above .800 ..does not take much to hold 3.3 grains of Bullseye. Healed portion of projectile has not changed with re-sizing
Obviously not using powder coat with black powder.. ( Sam Colt Rolling In His Grave )
The brass ring when pulled away has been leaving a sharp edge between heeled portion and non heeled portion. Excellent! .. that is why any paint flow would need to be removed from outside of brass ring if ring reused.
Question us between the ●●● above .. thanks