I have many but I suppose my very favorite is my 30-06 rolling block that I made from a block of 4140. I made it because too many people told me that a rolling block was a strong action, but not strong enough to handle a high pressure round like a 30-06. It took me seven years to fabricate, an hour here and there after work . I made everything but the barrel, springs, screws and the rear sight. Barrel is from Brownell's, 27" long, 1-10 twist. All springs are coil. In addition to being made from superior steel compared to the originals, every part has been up scaled in size and thickness. The breech block and hammer are only as wide as necessary this allows for shorter action pins ( stiffer ) that are 9/16" . The originals were 7/16". The side walls of the action are thicker than the originals. Everything was professionally heat treated to RC 40. There is a penalty for all that beef; the gun weighs 10 1/.2 pounds. it has a mild recoil for an 06, no surprise there, with that much weight. I rust blued it at home.
The gun ate a German proof round that came in at around 85,000 PSI, if my math was correct. ( Had to convert kilograms per square centimeter to PSI ) I fired the proof round ( remotely ) followed by 10 180 gr. factory rounds. The headspace was unchanged. The empties fall out of the chamber of their own weight. Expansion is less that .001 a quarter inch ahead of the rim. The empties can be full length re-sized with my little finger. So much for "spring" and "stretch" in a rolling block action. Might happen in the originals, not in mine.
I haven't done much range testing, as I can hardly stand up on some days. Back is a train wreck. With the limited shooting I have done it seems to be quite accurate. I can hit a 6 1/2 ounce cat food can at around 75 yards with nearly every shot.
A couple of years back when the Arsenal museum was still open, the Remington Historical Society paid us a visit. Roy Marcot, authority on old west firearms and noted author was with them. He liked my gun. I considered that high praise!
Sorry about the upside down and sideways pic. Puter is drunk again.