Printable boolit template- Did I do it right?

[jabilli]

So I'm looking into fiddling with paper patching.

Not sure if I did this right or not, but I made a printable PDF that fits around my .223 pretty well. Feedback please? Anyone print this out and confirm it works for them? The sizing does seem to be about right for printer paper, but I'm thinking for those who use thicker paper, it might need be enlarged slightly...Yes? If so I will whip up a bigger version.

https://docs.google.com/file/d/0B2uU...it?usp=sharing I promise it wont send you somewhere bad.

[jabilli]

Should be noted! There is a significant difference in size when you cut inside the lines, in the middle of the lines, and on the outside of the lines.

Tried it with double wrapping as well, just cut it 2-long and wrapped. This, without any kind of glue or paste, just the paper, added .010" with my standard printer paper.

[jabilli]

No love for the .223 hm? Haha Okay how about I try a caliber that more folks might actually cast- 9mm . Being .356, I assume these also work for .38 special, .357 Magnum, and .357 Sig.

In two different flavors- Black and White, and for those who want to be sparing with their ink- Greyscale. :-p

https://docs.google.com/file/d/0B2uU...it?usp=sharing -Black and White

https://docs.google.com/file/d/0B2uU...it?usp=sharing -Grey

You'll see I marked and cut each to half-height, so there isn't a ridiculously long tail. Also get twice the patches. :-p (May or may not work for other bullet types, I assume.)



I noticed after I submitted this that the twist is going against my rifling direction (clockwise) I remedied this by flip-flopping it around so it goes the other way.

[jabilli]

Howsabout you .30 cal shooters?

Lee CTL312-160-2R pictured left, Lee C309-120-R Right

https://docs.google.com/file/d/0B2uU...it?usp=sharing

[geargnasher]

Attachment not working. I think there's a sticky on patch templates, if not there's a good thread on it somewhere, much easier. I cut them several hundred at a time with a guillotine-type paper cutter. Painter's tape makes great guidelines for the length and angles. Might I make a plea for WET patching? MUCH easier for me and works a whole lot better on the smokeless stuff because it shrinks tight into the grooves and stays put going through the gun.

Gear

[jabilli]

Ah I see an error in the formatting I did- I'm guessing you clicked the first link in the .30 cal window? I went back and edited it so it should work fine now. I understand you to be very experienced in PP so if ya say go wet, I'll go wet. I saw somewhere that someone had a template for a .303, I'll look again, thanks

[Hardcast416taylor]

Attachment not working. I think there's a sticky on patch templates, if not there's a good thread on it somewhere, much easier. I cut them several hundred at a time with a guillotine-type paper cutter. Painter's tape makes great guidelines for the length and angles. Might I make a plea for WET patching? MUCH easier for me and works a whole lot better on the smokeless stuff because it shrinks tight into the grooves and stays put going through the gun.

Gear

You got it right about wet patching Gear. Robert

[303Guy]

I'm the 303 template guy. Mine are curved to suit my tapered boolits and I dry wrap for now. It is hard on the fingers but does conform to the boolit grooves - but hard on the fingers to get it there. Wet patches require a slight adjustment to the size to accommodate the wet expansion which is why is shrinks tight on the core. Volume patching will require wet wrapping for sure. Oh, cutting curved patches defies volume patching right there! But one day I'll build a patch punch.

[jabilli]

@303 - Wow, that must have been quite an undertaking to design the curve so that it would wrap around it just so. This design here was simple but a PITA to make, I imagine less of a PITA to do than yours- I found an image of a rhombus, then copy and pasted it in an image editor zoomed in veeery carefully so the pixels aligned. After making one row, copy, paste, copy paste, several rows. I did this rather than drawing lines for 3 reasons- 1. I don't have a protractor so I couldn't physically draw the template, then scan it in. 2. I don't know of any protractor type tools in graphic editors. 3. I figured even being very careful, I felt drawing lines whether by hand or by computer, could still leave room for missing a angle by a degree or two. I was For sizing I calculated circumference based on diameter, to give me an idea of ABOUT the size needed...then print,try, curse and swear, print, try, curse, print, try, curse until I got it just so. To my frustration, and as I expected, using thicker cotton or linen paper makes the template turn out undersized.

I tried wetting a few pieces of cotton paper- It was nice in the sense that it didn't slip on the bullet as wound it around (as much) but I found that it was quite easy to tear the paper when wet. >< Youtube video guys made it look stretchy like taffee. :-p

[303Guy]

I draw mine using CAD. I can copy with ease. The actual shape development on CAD is easy and the accuracy is absolute. But not necessary for cylindrical boolits. I'm going to continue playing with tapered boolits and curved patches but I've got to find a better way of cutting them!

How I develop a patch shape is I measure the boolit at two points with one wrap of the paper to be used, base edge and nose diameter where the patch will end and the distance between those points. I then draw two circles using those diameters at the measured distance apart, the smaller circle directly above the larger. I then extend the tangents of those two circles to find the intersect. I then draw two circles from that intersect through the centres of the firs two circles. That forms the correct curve of the patch. I do a little dancing act to get the side angles then add an offset circle to create the patch tail or skirt. I could probably just quote nursery rhymes from this point on and no one would notice.

[eljefeoz]

I could probably just quote nursery rhymes from this point on and no one would notice.

You could.Whew, that is a bit steep, the process of designing...

[Infidel]

Hmmm... What was that about removing doubt?? I just now looked at this. I'm obviously doing it all wrong. And, 303guy is right, My eyes were glazing a bit! If I get ambitious enough to try it, and can see it, I might understand it better. What was that bit about Mary and a lamb?

[eljefeoz]

Hi Jabilli, just tried your 30 cal design to PP a Lee 0.309/170 to 0.324.
Will report back as it happens...
Thanks for the patch design
Cheers

[jabilli]

Hi Jabilli, just tried your 30 cal design to PP a Lee 0.309/170 to 0.324.
Will report back as it happens...
Thanks for the patch design
Cheers

You're welcome- Hope it works. :-p

[303Guy]

Something on wrap direction - it's the unwrapping in flight that dictates direction. This happens to be the same as the same direction as the rifling. Anyway, there's more chance of the patch jettisoning quickly when wrapped in the twist direction. It'll make no difference if the patch confetti's but probably a big difference if it comes off in big pieces (I think). Me being right handed I think it's more natural to wrap for my left hand twist bores (or maybe it's just the way I do it and I'm used to it?)

[Aces an Eights]

How I develop a patch shape is I measure the boolit at two points with one wrap of the paper to be used, base edge and nose diameter where the patch will end and the distance between those points. I then draw two circles using those diameters at the measured distance apart, the smaller circle directly above the larger. I then extend the tangents of those two circles to find the intersect. I then draw two circles from that intersect through the centres of the firs two circles.

Sorry if I'm hi-jacking.
303 I really like your conical idea, I'm going to try it out with a TL230-452-TC in my 1895, it should be extreme : - )

Curious do you account for the diameters being bigger on the 2nd wrap?

[303Guy]

Curious do you account for the diameters being bigger on the 2nd wrap?

Yes I do. That's why I measure the diameter with one wrap.

[Aces an Eights]

Cool, given me a lot of food for thought thanks.