ArmiSport Spencer .56-50 bore and groove diameter?

[Two Flints]

Hello SSS,

The following question was asked:

Does any one know the exact dimensions of the ArmiSport Spencer .56-50 bore and groove diameter?

I Emailed my contact at Armi Sport in Italy, and was sent the following chart which may or may not answer the above question.  It requires some interpretation, but I thought I'd post it anyway.

Hello Two Flints,
The enclosed a chart showing all dimension for 56-50.  I have translated major references, if it's not clear let me know and I will translate it completely, it is the official CIP European Chart for the cartridge which we designed according to our dimensions.

[Crazeyiven]

Two Flints-

If you are wanting to know the "exact" bore diameter of your rifle, you might try slugging it.  Even a factory printed spec is going to vary from rifle to rifle.  I use a pure lead bullet for a 58 cal musket, tap it into the muzzel (after cleaning and lightly oiling the bore) with a wood or plastic mallet, then I switch to a short starter, tap the slug in more with it then finish with a oak dowel close to bore size to finish it.

Back to the chart.  At least it gives an over all length (L6) for both ctgs/bullet styles of 38.56.  That converts out to 1.5181".

Too bad we cannot collect more information on bullet used and OAL.

Good luck,

David

[French Jack]

It also gives the diameter of the barrel with a bore of 12.7 mm and a groove of 12.95 mm .