Just picked up Remington R51 on Tuesday. Have not been able to get it to the range.
First impressions:Feels really good in the hand and points naturally. With grip panels with a little palm swell, it would fit my hand as well if not better than my BHP and for me, that is saying a lot.
Sights are tight. At least, they do not move under finger pressure. Very visible and easy to pick up.
Slide is tight and a bit rough. Yes, it is hard to rack. Is a lot easier if the grip safety is fully depressed and even easier if the trigger is held back while racking. Then release the trigger so it will reset. Slde doesn't hang or remain open or even seem to want to. Return to battery is strong. After stripping, cleaning and regreasing, including the rails which did not appear to be greased initially, slide is smoother.
Trigger has some side to side play but it doesn't seem to have any detrimental effect. Pull is crisp with about 1/8" take up and a clean break around 5-5.5#. i don't know why the side wobble is there. It feels like the pin hole is oversize for the pin. Maybe a bushing would help.
Grip safey is not stiff. Disengages with noticable pressure. There is an audible click but it is not loud. It offers enough resistance to prevent inadvertent depression but not enough to interfere with functioning. Anyone using a grip with push-pull tension should have no problem with the safety. Using a thumbs forward grip with side to side tension may result in erratic depression of the grip safety. It may take concious effort to remember to depress it.
The overall feel is a bit rough, but is about what I would expect from newly machined parts with a matte finish on the bearing surfaces. Should smooth out with use.
Field StripNo issues field stripping except the end of the slide stop pin is recessed in the frame and tool of some kind is required to get the pin slide stop out—I used the corner of the mag floor plate. Worked just like the videos and the manual, once I got the hang of holding the slide in the right position with the take down notch aligned properly and then turning it over so I could see the SS pin to push it out.
A Look inside.
The breech block does not have any rough spots on any bearing surface. In fact, the camming surfaces appear to have been polished.
The gouges in the frame reported by Tactical Existence on YouTube are not present but I haven't been to the range yet. The "gouge" points are the surfaces that cam the breechblock. The finish is worn off at these points from hand cycling the action, but there does not appear to be any deformation of the metal.
There are no machined groves in the barrel area of the slide as in the TE video. Barrel and chamber look smooth and free of burrs and machine marks.
Remington says that any disassembly/stripping beyond feidl stripping should be don by factory techs. Looking into the frame it is easy to see why.
For one thing, the internals are fairly inaccesable, and the sear pin, trigger pivot pin, hammer pin and upper saftey pin (my names) all hold multiple parts in place, which includes springs that are saddled around other parts. Slave pins will absolutely be required for the sear and trigger and probably the hammer and safety which can't be easily seen with the grip safety in place. I wish I could find a schematic.
The trigger assembly is attached to a stirrup (like a 1911 or the 51) which may be further attached to the sear or safety assemblies (it extends into an obscured space and can't bee seen) I would like to try to put a bushing in the trigger pivot hole to take out as much of the wobble as possible, but I'm not sure I can get the trigger assembly out. I am sure I would need a slave pin (or the bushing) to put it back in, and if I can't get it out, I can't install the slave pin to get it back in. Fortunately, the wobble is the only thing about the trigger that is objectionable enough to require attention.
Dimensions (measured)Weight w/empty mag; 22.3 OZ.
Weight w/o mag: 20.6 oz.
Length (Diagonal dimension-base of grip to muzzle): 202mm / 7.95"
Length (straigt line Muzzle to base of grip line): 175mm / 6.89
Length (Muzzle to end of slide): 172mm / 6.77"
Height (base of grip to top of sight): 116mm / 4.57"
Mag well width: 15.4mm / 0.606"
Mag well length: 36.9mm / 1.45"
Magazine width: 15.1mm / 0.59
Magazine length: 33.2mm / 1.31"
Grip Height BackStrap: 78.9mm / 3.10"
Grip Height FrontStrap: 63.5mm / 2.50"
Grip Length: 52mm / 2.05"
Grip Width: 25mm / 0.98"
Pull: 75.2mm / 2.96"
Front of Trigger Guard to Muzzle: 45mm / 1.77"
Inside Trigger Guard Height: 23.7mm / 0.93"
Inside Trigger Guard trigger to front: 25.3mm / 0.996"
Barrel (breech face to muzzle 84.6mm / 3.33"
Barrel (case base to muzzle 87.7mm / 3.45"
Sight radius 116.75mm / 4.6"
Sight height (above bore center): 17.78mm / 0.7"
Headspace/Firing Out of Battery (FOOB)/Fail to Return To Battery (FRTB)I seen reports and several vids of Failure to return to battery and firing out of battery. I haven't been to the range with mine yet, but:
Most FRTBs were reported on the first round from the mag. I loaded up a mag of dummy rounds I made up using MBC 9Cone and the only way the first round created a FRTB was if I rode the slide down. Releasing the slide from lock and letting it drop chambered the rounds every time. So, I decided to test further with other rounds. I had some other dummys made up for plunk testing my BHP. These would not fully chamber. In fact, the bullet was jammed on the lands with the slide clearly out of battery. I put the rear sight on the end of a piece of 2x4 and leaned on it to eject the round. It ejected the case leaving the bullet stuck in the barrel and I had to tap it out with a rod.
I then plunked an empty case, a Federal 115g FMJ, and a Remingtion 147g Golden Sabre and an older dummy with a differnt lead cone bullet. and took measurements.
Except for the initial dummys which I had intentionally seated deep and the empty case, all failed to fully chamber, and the bullets had clearly engraved on the lands. The humber below reflect the amoung of case exposed when chambered and the amount in excess of the empty case.
Empty Case: 0.120 (0.000)
9Cone Dummy #1: 0.120 (0.000)
9COne Dummy #2: 0.186 (0.066)
Lead Cone Dummy: 0.150 (0.030)
Federal FMJ: 0.141 (0.021)
Rem GS: 0.124 (0.004)
Win ST 0.120 (0.000)
Having the bullets deeply engraved in the lands is going to raise pressures. and if the gun oi out of battery as well, it is not a good situation. Before I go to the range, I may load up some minimum loads of varying OALs.
Obviously I am going to have to seat deeper when reloading for the R51 than I have been doing for my BHP. And I think the bullet diameter and shape and OAL of factory loads may be critical. In one of the vids, from either RyeonHam or Tactical Existence, he had FOOBs and FRTBs with Cor-Bon and Speer Gold Dots but no problems with Remington FMJ. Somehow, I have the feeling that Remington's new Ultimate Defense will work as well.
I slugged the barrel (since I already had bullet stuck in it) with the following results:
Slug diameter: 0.3565
Lands: 0.3460
Grooves: 0.3560
Diameter of bullets tested:
9 Cone: 0.3565
FedFMJ: 0.3550
Rem GS: 0.3470
Win ST: 0.3510
The Rem GS and Win ST are apparently close enoughto the land diameter that they do not jam on the lands before fully chambering. The lead 9Cone and the Fed FMJ are closer to the groove diameter so they do jam on the lands.
I have seen reports online of Cor-Bon and Speer Gold Dot failing to fully chamber, and Remington FMJ chambering peoperly. I have seen no reports of bulging case or bulging primers confirmed to be associated with fully chambered rounds.