Re: Tips on transitioning from a bolt to a gas gun.
NTCH is very popular with M4s, but I am too sure I would want to do that with a Precision Platform.
For off, with an M4, they are much smaller optics and smaller mounts, usually single throw. They also come in a variety of sizes and heights. I know I have a stack of GDI Mounts here, and they employ a short, medium and tall. So getting the proper eye relief is much easier.
Most good precision optics have about 3.5" of eye relief, to get that far forward on the top of a semi you have to have some sort of cantilever mount. A non-Monolithic upper only has about 8" front to back before you have to cross the upper receiver with the hand guard. So being able to set eye relief and cheek weld is much easier with a stock like a PRS. Not everyone will have the same bone structure as you (JB) so saying it works for you, may not work for others. An adjustable stock that you can adjust is always going to be preferred. This way you can set the rear of the scope some where over the charging handle, and still use that 3.5" Eye Relief.
NTCH is very popular with a 5.56, not sure I would do it in this context. I get it, you see a lot of people climb up on the M4 to get tight, but a precision Semi is a different animal, at least in my opinion. That said, if it works for you, I don't recommend changing, but the adjustments on a PRS should give you all the indexing you need. The stock is shouldered the cheek weld is established the eye relief and sight picture should have been adjusted perfect at that point. I know I use some pretty good sized optics on my Semi Autos, and without a cantilever mount no way I am getting them to fit on top of a semi without going past the hand guard. So, back a little works fine for me. Especially because I can adjust the stock.
Different strokes that is all...