Dual Diameter Paper Patch Bullet Wrap

[patchbox]

Question for you guys that shoot a dual diameter paper patch bullet:
When finishing up the wrap where the seams meet do you aim for the seam to meet for the major diameter or the minor diameter, in other words, say for a DDPPB with a base diameter of .452 and a nose or minor diameter of .445 would you shoot for the seam gap to be closer on the .445 diameter and just live with a slighter wider gap in the .452 section? Or does it make any difference at all? I would think you would want to aim for a proper seam width on the minor diameter and let the chips fall where they may on the major diameter in order to avoid any overlap.

[patchbox]

The DDPPB that Mr. Wasserburger uses has peaked my interest so I ordered one and am preparing for how to make my template length to achieve a proper wrap length in the seam/gap area.

[kwilliams]

On my DD I aim for a parallel seam which at first was hard to arrive at. My patch is not a true parallelogram, 1 leg is slightly longer for the larger base diameter. I use a paper cutting jig I made, rotary cutter on board and is adjustable. I take a small nip off the base corner stack so as to see which is the bottom when rolling on the 3d printed jig I picked up at the Q shoot. After its all figured out I can cut hundreds fast, and wrap dry.
kw

[patchbox]

Ok, got it, that makes sense - thanks for sharing your process method.

[bpcr shooter]

Ive just matched the minor dia and its been fine for years.

matt

[patchbox]

Thanks everybody for the feedback. I think I will try just matching the minor diameter first before making another custom template. We’ll how good the seam is and how it shoots with my .445” pp template.

[kwilliams]

The thing about making an adjustable cutting jig is that you don't have to constantly make templates to alter the patches. Some ingenuity will get you there.
kw

[Kenny Wasserburger]

Slightly shorten the bottom edge that will fold over the bullet base about .006-.008 the paper will stretch put most of your pressure towards that base end. This is with wet patching of course.

Kenny Wasserburger