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I am interested in making cast boolits for my 1942 Longbranch No4 Mk1*.

After reading the posts on here I have slugged the barrel and made a chamber cast and took measurements.
The slugged barrel came to .313

A = .313
B = .314
C = .338
B to C = .114

Would it be right to use a boolit at/sized to .314 or would .315 be better?

Also which powder would be acceptable out to 600 yds max?

I have a plentiful supply of TR140 but I cannot find enough info on it to see if it would be suitable?

atb

Bernie

When you say that the barrel slugged at .313 what do you mean, groove or bore diameter?

What did you use to make the cast with?

What type of boollit are use anticipating using?

TR140 is bit slow for this application for 600 yrds 1800 fps is more than enough especially with a heavy boolit so fast rifle powders like the N120 Reloader 7 burning rate would be my choice.

When shooting cast you must not contaminate the process with jacketed boolit experiences, methods or thinking.

Hi,

I am new to this so please forgive my lack of clarity.

I meant the groove diameter was .313, as best I can measure it with 5 grooves.

The cast was made with sulphur mixed with some graphite powder. I read on the castboolits.gunloads.com forum that this helped remove the cast easier.

I was looking at 185gns or 200gns boolits possibly heavier for 600yds?

I will have a look at N120 and Reloader 7 powders.

Just out of curiosity how many grains of tr140 be safe to use with a 210 cast bullet.
I was given 5 cast bullets about a year ago so rather than buy a powder for only 5 shots I would like to use the tr140

I'd try with a .316" or .315".

Sulphur gives good cast but is fragile and not that dimensionally accurate.

What type of boolit are you planning on using? any pictures?

shotgun sam wrote:Just out of curiosity how many grains of tr140 be safe to use with a 210 cast bullet.
I was given 5 cast bullets about a year ago so rather than buy a powder for only 5 shots I would like to use the tr140

It is not necessarily unsafe to use the powder but you would end up driving to bullet at velocities too great for most cast boolit alloys and loading procedures.

To get TR140 deliver the velocity suitable for most cast boolits then I suspect that the fill ratio would be too low for the case, getting into SEE volumes and poor burn characteristics.

Better to get some fast pistol powder of some one, 5 rounds at 4 gns a round is only 20 gns surely someone could spare you that.

I was looking into casting my own boolits.

I have looked at the 314299 202Gr. RN 2 cavity 1GC 1PB mould from NOE or the C321-185-1R dbl cavity mould from Lee.

When I have purchased some lead i would like to try an impact cast.

I'd recommend the 316299 from NOE

I'd go with the NOE mould over Lee any day.

Also I'd get the 316299, they are currently in stock.

Depending on how much you want to shoot a two cavity could be a bit slow, also I'd just get the GC design. They work fine in most rifles unchecked for plain base velocities.

Thanks Dromia and dodgyrog, I will have a look at the 316299.

Thanks for your help.