The original inspiration for this thread is now complete, so time to update. I guess I should say phase one is complete in that I have a functioning rifle. Phase two will be adding express sights, a barrel band swivel, and cerakoting it. That will wait a bit until I have any bugs worked out. A crappy pic is shown below.
Due to some minor challenges, some foreseen, some not, my $1900 pile of parts turned into a $2450 rifle. Still very affordable, all things considered.
1. The barrel channel had to be opened up in the stock. I knew this coming in since B&C doesn't offer the heavy barrel version of the stock left-handed. The ejection port cutout also needed to be enlarged.
2. The McGowan prefit barrel wasn't. The shank required a bit of work necessitating a reamer rental. This is the second time I've had this happen with a prefit, the first was a different manufacturer. A good reminder to always check headspace.
3. The latch in the Redhawk Rifles floorplate required a bit of fitting. It was very difficult to close originally. A bit of filing later and it works like a champ.
4. The Wyatt's magazine follower was missing a chamfer at the rear so it would hold the bolt open on empty. Once again, a bit of filing fixed the problem.
All-in-all, fairly minor issues assuming you have a gunsmith with a lathe handy. Mine is just down the road. The barrel and stock work added a few $100 to the price. Having had four semi-custom rifles put together using prefit barrels now, there has only been one that didn't have some sort of unexpected SNAFU. All have been easy fixes, again assuming you have a gunsmith handy or happen to be a machinist. Don't expect to just be able to screw the parts together and achieve perfection, some tweaking is probably going to be necessary.
The bare rifle weighs 8 lbs, 6 oz. This is a little heavier than I was originally anticipating since I decided to go with a #6 contour instead of a #5. It's also actually a few ounces over what I was expecting taking that into account. It's only slightly muzzle-heavy since the barrel is only 20" long. The balance point is right around the front action screw. Adding a bit of tungsten rod in the buttstock could be done, but that will wait until I have it in its final configuration. It may be unnecessary.
For now, I've mounted a Vortex Viper 2.5-10 that I picked up for a bit over $200 and screwed on a Rex Silentium MG7 that I got for $350 not including the stamp, in keeping with the budget theme. This brought the weight to 10 lb 10 oz. Longer term, it will probably get a GPO 1.5-9x44 and an 8" Ecco Accipiter Ti. I've been very happy with that GPO scope on my .308 and it has enough tube length to fit on the .375 using two-piece bases. The MG7 really isn't up to the task on a .375. I bought it for a .44 magnum carbine and it's too small to be effective on a .375, hence my desire for another suppressor.
I just picked the rifle up yesterday and plan to shoot it later today, so my thoughts may change, but so far I'm happy with the results.