Earliest uniform that would work with a Mk3 an Enf

Being a cas/SASS shooter costuming is important to me. Im just curious what is the earliest uniform that I can get away with when shooting my Mk3 in a BAMM? I wear this outfit when I do our January shoot to commemorate Rorkes Drift. Not having a Martini I use my 1873 Winchester musket with its bayonet. ‘No comedians please.’

Thanks, here I am in my Span Am outfit with an 1899 Constabulary [school] rifle [ignore my watch]. Years ago I suggested that we try a bolt action match along with our monthly cas match. We also do our Wild Bunch shoots along with our monthly cas shoots. Everyone gets to play. The pistol and sg targets were the same for all the shooters but the cas rifle shooters had a array of their own and the bolt action shooters had their rifle targets set farther out. The rifle order of engagement was the same for either. It was a big hit and now we shoot it 2-4 times a year. Nowadays there is a more or less organized thing called BAMM, Bolt Action Military Match that is an offshoot of Wild Bunch. Suggest it at your club if you have a group of milsurp boltgun collectors and cas shooters who will not have a hissy fit. ‘More fun than a hog killen!’  Even better if you dress the part. 

I always hated to waste money to buy ‘real’ dress clothes but never minded buying cowboy dress clothes, my wife was delighted so eventually all my ‘good’ clothes were my cowboy clothes. My ropers are still my church shoes. There were a lot of ex soldiers in the west from conflicts all over so uniforms probably weren’t an uncommon sight. Don’t forget to mention using lead bullets [gas cks are ok]. 

Almost forgot..the tunic cuffs should have the colour of the unit & usually some braiding on sleeve