Have wondered about PP'g, but decided that life (at 68 ) is too short to spend the time on same. Don't need another discipline to load when I'm still learning GG.

Am also on the fence on the 35-40. Have an original 28" Hepburn barrel that started life as a 32-40 and is currently lined down to a 22 Lovell of some sort that I will have JT line back to something. Just not sure what, as of yet. Think that 35-40 based on 38-55 brass (Steve Baldwin's 35-40 configuration) would be nice and a terrific Schuetzen cartridge that could also knock over the occasional silhouette animal.

Excellent point Chris...   easy to get focused and overlook the obvious.

SgtDog,
I presume you meant liner at .375x.368/14 twist.
I think you will be able to go up to a 300+ gr bullet
People shoot the Lyman 335 gr in such barrels to good effect.
beltfed/arnie

John:  I've got lost in this thread what your final intentions are.  If you are going to shoot a 38-55 ... The Accurate 38-320E mold is the clone of the Ideal 375166.  In a 1:18 twist, Don Miller calculated a 17.65 ratio for black powder, plus with 1105 fps in the Powley Calculator the stability factor is 3.2 in a 1:18 twist barrel.  For fixed cartridges, I shoot this bullet exclusively out to 300yds with MOA accuracy at each distance.  Plus, I've shot it with accuracy on the silhouettes from 200 to 500 meters 
Accordingly, if 38-55 is to be your caliber - the Accurate mold needs no modifications

JohnBoy, don't blame you for not doing a complete re-read.   I decided along the meandering of this thread that I liked the 35-40 Maynard.   However, I was limited on the twist available with TJ Liners.   He dug one out to give me a 14 so there I am.   

And Beltfed, you are right that I got one of those numbers wrong... had to be the case, unless my lands were on the outside of the barrel:-)   Jeeze.   Not sure what I could blame that on.    Correct numbers = .357x.348.   

And Joe, of course you are right, ceptin now I got the wheels back in the ruts and it's not the 38-55 as the thread title would indicate.   

Frank,  Now that I’ve backed the truck up, one of the ones I thought about trying to scale down with the TNT software was the bullet John Boy is a fan of.     I know you are familiar with the 375166 – and the link I posted is the Accurate version of the  Ideal 375166 which came to me compliments of John Boy.    That one (unmodified as John Boy says) is on my list for my Cody 38-55. 

But back to scaling a bullet down… my fear would be the investment without any validation a scaled version would fly as well as its parent.     Still think I’ll see what the software says about it.  Probably make the base driving band at least .100 long.   And I don’t have a clue how you perform two radius’ on the ojive with the TNT software.    I plague poor old Tom enough as it is.   Last time we talked we found my version didn’t fully support the reduced driving bands.   Have not figured how to fix that one yet.      

Thanks Frank.   I will likely take you up on that.   Grandson will be wrestling at State the next two days so probably be next week.  I'll pm.   Btw... I was thinking the very same thing about removing one band and making the nose longer.   And going to Tom's minimum meplat.  

SgtDog - sure how after your paper modifications on the 375166 and before you have the mold made .... that you run any of the Powley - JBM or Dell's calculators to determine based on dimensions - velocity & stability factor if it fits the twist ratio of your barrel