Interesting John, sounds like fun.  Walt Shefter and Hank McCleary built 38/55s way back in the eighties but didnt fare to well against the 32/40s.
That was back then. 

I have a new RKS .38 stainless gain twist blank.  Hmmm,  now if I just had a decent striker action.  Dont have a 38/55 reamer. I do have a 38/40 Rem reamer.  Would that qualify?   

                              Joe. 

Just thought of it, I have a Ruger #3, speed locked with Kepplinger trigger I could mount that RKS barrel on.  Original wood. That would make a good BR rifle. 

38/40 Rem case might work like a scaled up .32 MS.  

Winter project. 

           Joe.  

JLouis

I suspect the only thing holding the 38/55 back bench rest is recoil.  Build the rifle heavy that can be overcome. Offhand at 200 the 38/55 performs as well as my 32/40 barrel on the same rifle.  It's about 13 lbs with the scope mounted. One thing favoring the 38 in a 100 shot match it's easier to spot the holes. Cross fires due to not counting the holes properly has cost me points more than once.  That's not going to happen to a re-entry bench rest shooter but a real factor for the offhand shooter.

Let me know how you do, I am using the that Hoch bullet cast 1/25 pan lubed with SPG in my 18 inch twist Douglas barreled CPA offhand rifle.  I look for the same velocity that Don  Miller specified using either 4759 or 4227 powder and a small pistol primer.  Use up my current lot of 4759 am going to 4227 exclusively. I hardly ever shoot it bench and it's not stocked for consistent bag ride, only have a rough idea of it's potential.

Boats

John,

If the Miller twist rate is something like an expanded Greenhill formula, there may be quite a few who would be interested in seeing it. 

Perhaps you might post the details here?

John,

Sounds good to me. 

If the spreadsheet file size is over the 500kb max attachment limit, you might be able to use WinZip to compress it to a smaller size that can then be attached in a post. 

Each of us could copy the zipped file to our computer and unzip it for use. 

Thanks,
BP

John,
It worked great for me, too.

Thank you very much,

Frank

I checked that blank. It's .377 - 14 inch twist. I have lot of .38 bullet molds.  If this .38 is anything like my .32 it'll shoot any of them very well. 

                       Joe. 

Okay John, I went back and read carefully all that is on the page at the link you provided. Most of what I understand relates to hi speed jacketed bullets.  Now i'm still guessing, but is the program used to find the optimum bullet velocity? to match the optimum rotational rate of a certain length bullet? For best accuracy?  In that case it wont do me much good. I dont have a chronograph. Well, I do, but it's the one with the crank on the side. I think it was the first Ohler. It has a book with lists of numbers to match up.  Belongs in a museum. 

                    Joe.