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 45-70 Line Throwing Blank Mk1 & Mk32 
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Joined: Wed Dec 31, 1969 8:00 pm
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Post 45-70 Line Throwing Blank Mk1 & Mk32
What are the differences between an M1 and a M32 Line Throwing Blank. Do the Mk-1 and Mk-32 refer to the cartridge or to the gun?


Mon Mar 12, 2007 3:03 pm
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Ron

Without doing any research I took a quick look at my GI Spam Can of blanks and it is marked

10 Cartridges
Cal.45 Blank Line
Throwing M32
For
Gun, Line Throwing, MK 1

Ray


Mon Mar 12, 2007 4:49 pm
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Ron

I should add - the blanks I have are from my period of service (1950s). The only guns I ever used were cut off Trapdoors and H&R type shotguns. I know that there were others, such as modified Springfield M1903s and, later, a Mossberg type shotgun. I have no idea what cartridge they were chambered for. My military mind tells me they didn't start with M32 so there may well be at least 31 other cartridges out there.

Ray


Mon Mar 12, 2007 5:09 pm
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Ray--Both the M1 & M32 designations are on .45-70 blanks. Headstamps are WCC 45-70 MK1 -1943- and WCC 56 45 M32.


Mon Mar 12, 2007 6:32 pm
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The Mk1 is loaded with black powder and has one fiber wad; the M32 is a smokeless load, and has three fiber wads. I imagine the M32 primer is non-corrosive, whereas the Mk 1 is not. Heres a picture of the sectioned blanks.

Image


Here's the Mk1 box:

Image


Mon Mar 12, 2007 7:21 pm
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Guy--Thanks for the sectioned round pictures and explination of the differences.


Mon Mar 12, 2007 7:45 pm
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I goofed. The box pictured above is for the 1943 dated MK 1 cartridges. Sorry about that.


Mon Mar 12, 2007 7:49 pm
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Guy--I had already figured that out based on the "43" date on the box. I went back and edited your caption so it is correct for future reference.


Mon Mar 12, 2007 7:55 pm
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Guy

Great photos and great info as per usual from you.

A couple of observations on my part.

Notice the heavy roll crimp on the M43. That is because the brass bolt (rod) was NOT supposed to enter the case mouth but was supposed to fit on top of it. The MK I appears to be made so that the bolt enters the case.

MK I are headstamped 45-70. Since most of the WW II line throwing guns were Trapdoors with original chambers and bores I suppose it seemed natural to headstamp them thus. Later guns like the H&R had special made barrels and I don't recall them being marked for caliber.

Ray


Mon Mar 12, 2007 8:09 pm
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