I got my 5mm Remington Rimfire Magnum rifle barrel today in the mail and mounted it on a Thompson Center Contender frame. Unfortunately, the shoulder stock didn't arrive and evidently won't be here for a few days to a week. (UPS is terrible here) I also don't have the proper rifle foreend but not wanting to give in so easily to Fate, I mounted the Hornet pistol fore end on the barrel until I can make or buy one. As you can see it looks a little ridiculous in it's current state.
I was lucky in that I had a Redfield base and ring set for the Contender but unfortunately, the only unoccupied scope I found was a ratty Simmons 3-9X. I figured it would do for a preliminary shoot. I swabbed the barrel with solvent until the patches came out only grey instead of preservative- brown and headed to the range. I fired the first 50 rounds into the ground. I have never seen a new, freshly cleaned barrel group worth a darn and I wanted to season-up the bore a bit. Even with that expenditure of ammo, it took another 20 rounds to get the grouping to settle... or as close to settling as I could get shooting such an awkward rig. This is my last group at 50M. That dot it a half inch in diameter.
I like the 5mm Remington. With a 30 grain HP at 2538 fps it makes the 17HMR's 17 grain pill seem like a weak effort. I have a few of the original Remington rifle for this cartridge but I particularly like this Contender because I can flip a switch and convert it to a centerfire. This will allow me to shoot the 5mm Craig wildcat (5mm Remington RF Mag Centerfire) from this rifle. In my other Craig conversion I'm shooting 32 grain V-Max at 2600 fps with a full case of Lil Gun. Now I can have the option of using factory rimfire ammo, or my own handloads, with a simple flick of a lever. I'll post some pics of the gun, and CF groups when I get my dies back. ~Muir