Hello I've been looking for a martini henry in 303 for a while to fill a gap in the old collection. I can't seem to find one, but came across a martini metford. I didn't even know this existed until now. From the research I did with the little info I found, I guess metford barrels were attched to martinis to allow use of 303. And then later brand new enfield barrels were fitted. My question is will they hold up to modern ammo? If I have any of my facta wrong please correct me.