I know colerain has a straight 15/16 in the 54 but the swamped its 1" at the breech
I guess the reason I was going to use a straight barrel instead of a swamped barrel is that this is my first attempt at building a longrifle and figure a straight barrel will be easier to inlet then a swamped barrel
A straight line vs a 3D curved one. Swamped is a bit more complicated but not ALL that much more. If you go slow and sure you'll be able to do it. Besides, to get it right you'd have to go slow and sure on a straight barrel too... ;o) A 42 inch straight will be heavy at the nose compared to a swamped 42.
My first self inletted barrel was swamped, came out fine, I had done a Chambers kit before that though so had an idea of how things went. Either straight or swamped its a chore, takes me four or five days to do one using only hand tools. I'm slow... but I try and be sure. You learn as you go, if you're not sure ask questions before you cut.
Getting the barrel in properly is the first step, everything else on a gun keys off the barrel, especially the lock and triggers so it pays to take your time - get it in, and right, and you're well on your way. You could have it and the ramrod hole done for you too, just adds to the cost.
dave