Roscoes at the Range

Yesterday I got out to do some shooting with a friend.

Top to bottom:

• 1974 Colt Detective Special in .38 Special I picked up about a week and a half ago.
• Early/mid-1990s S&W 632 Airweight in .32 H&R Magnum that was a gift from my dad several years ago.
• My friend's Charter Arms Professional in .32 H&R Mag.

I ran a couple different handloads through the Colt. Both were loaded with Lee TL358-158 cast semiwadcutters in mixed brass. The first batch were over 3.8 grains of HP-38 while the second batch were over 3.5 grains of Titegroup. In a medium frame gun like a S&W Model 10 these are very mild. They jump a bit more in a compact snub but remained controllable, especially the Titegroup loads.

First 18 shots with the Colt, with the HP-38 ammo, fired 2 hands, double action, from about 10 yards:

This is a great little gun. Colt should reintroduce it now that they've got back into wheelguns.

Next up was the Airweight. The last time I had it out I had several light strikes due to a reduced power hammer spring I'd installed. Before trying it again I put a 9.5 lb. Wolff hammer spring in it, which is actually a pound heavier than stock. This time it ran flawlessly

18 rounds from 10 yards, shooting .32 H&R Magnum 98 grain wadcutter rounds from High Desert Cartridge, which will be my new carry load. HDC uses powder coated bullets in this load and it burned very cleanly.

The Charter Arms Professional was bought by my friend around 2019. It was an inexpensive revolver but we've been impressed with it for the cost (about $300 at the time). It's a 7 shooter comparable in size to a Colt D-Frame (e.g., the Detective Special). He spent a lot of time working on the action and it's extremely smooth.

Another gun I brought out was my S&W Model 28-2 Highway Patrolman. This is an N-Frame .357 Magnum. I've owned it since the late 90s, when I traded an Astra A-75 towards it. If I remember correctly, the big Smith was priced at $250.

It's been ages since I've fired full house .357s from a revolver so we put 20 rounds of Federal American Eagle .357 158 grain JSPs through it. This is a screen cap from a video showing the gun in full recoil. In contrast, shooting the .38 Specials I had with me was a very mild experience due to the gun's 41 oz. weight.

The Model 28 is fitted with Thai Magnas and a grip adapter from BK Grips.

Aside from the wheelguns I also ran some rounds through my 2nd generation Keltec P32. I found that it dislikes the Fiocchi and Aguila FMJ I had on hand, giving me at least one failure to eject per magazine. My friend gave me some PPU .32 ACP FMJ with which it functioned 100% through two mags. The PPU also functions 100% in his Gen 1 P32, so we're going to split a case.

ATF Day 050320

Today I went to the range with the primary goal of zeroing the iron (plastic) sights on my Keltec CMR30 .22 WMR autoloader.

The CMR30 is a neat little rifle that weighs 3.8 lbs. unloaded. It fires .22 Magnum ammunition fed from a 30 round magazine located in the pistol grip. The receiver is an aluminum extrusion with Picatinny rails on top and bottom, in front of the trigger guard. The top rail is fitted by the factory with Magpul MBUS sights.

When Keltec announced it several years ago it immediately piqued my interest as a potential PDW that would be very compact, light, and reasonably effective for recoil-sensitive shooters. I finally picked one up last year in trade.

I've had the CMR30 out to a friend's place a couple times. It was in need of zeroing, which I finally did today at my rod and gun club.

I first put it on paper at 25 yards offhand and the fine tuned the zero at 50 from the bench. It's shooting about an inch high at 50 with either CCI 40 grain Maxi Mag FMJs or Federal 50 grain Game Shock JHPs.

I didn't take any pictures of the groups because, frankly they sucked. I attribute this to my not being able to easily focus on the front sight. When shouldered, the front sight is right at the distance where my almost 52 y/o eyes start to lose their ability to focus.

I did bring a Bushnell Trophy red dot with me and intended to mount it after zeroing the irons. Unfortunately, the Bushnell rings are intended for Weaver mounts and weren't compatible with the M1913 Picatinny rail of the CMR30.

After shooting the rifle the last time I field stripped, cleaned, and lubricated it with FP10. In spite of that, I had some reliability issues.

Specifically, on many magazines the second round down had a bolt-over-base failure to feed. Racking the action fed the round into the chamber and the rest of the cartridges fed OK. Keltec recommends using 40 grain or heavier ammo but I don't think the malfunctions were ammo induced. This didn't start happening until after about 50 rounds were down the pipe so I think it was a fouling or lubrication issue.

Another thing I noticed today (and which I experienced before) is that it spits unburned powder grains out of the ejection port. Right handed shooters may not notice this but as a lefty it's a bit annoying. If you're going to shoot one of these portside, glasses are absolutely required.

Both the reliability issues and spitting from the ejection port mean that until they are remedied, I wouldn't rely on the gun for defense.

I'm going to try and come up with some sort of brass and gas deflector.

All told, I put 150 rounds through the CMR30 today.

Aside from the Keltec I also brought along my Ruger 50th Anniversary Blackhawk .357 Magnum. I put a few cylinders full through it at a 25 yard paper target, and some at 50 yard steel. Once I got the elevation figured out I was able to regularly bang a ~12" gong shooting two hands, offhand at 50 yards.

The ammo I shot in the Blackhawk were some of my .38 Special +P handloads, with a 178 grain Keith SWC on top of 5.2 grains of Unique.

After getting home I relaxed out back with a Yuengling Black and Tan beer and a San Cristobal Quintessen cigar.

Range Day with the Kel-Tec RDB and Ruger Gunsite Scout Rifle

Today I was off and was able to get to the range with the Kel-Tec RDB and my Ruger Gunsite Scout Rifle.

The IOR Valdada 3x25mm scope on the Kel-Tec needed to be zeroed, along with shooting the rifle for the first time. Due to limited time, I was only able to get the scope zeroed at 50 yards, and put only 60 rounds through the rifle. The ammo I shot was 20 rounds of Federal American Eagle .223 55 grain FMJBT and 40 rounds of Prvi Partizan 5.56mm M-193 Ball (55 grain FMJBT, but loaded hotter than .223-spec rounds). I fed the rifle from the Magpul Gen 3 20-round P-Mag that was included with it, and a Gen 1 20 round P-Mag.

The Kel-Tec's manual states that it comes from the factory with the gas system setup to function with M-193 spec ammo. I tested this by initially loading one round, to see if it would lock the bolt back after firing. It did so, and thereafter while I was sighting in, I loaded 3 rounds per magazine.

Sixty rounds isn't anything more than a basic function check but the rifle did work perfectly. The RDB has a 1:7 twist and doesn't seem to care for 55 grain ammo, however. Groups were about 2" to 3" at 50 yards, reminiscent of an AK. I plan to try it with 69 to 75 grain bullets to see if it shoots them more accurately.

The recoil impulse of the long-stroke gas system reminded me of an AK. Unlike an AR-15 or AK, I got absolutely no gun-schmutz in my face, since the top of the action is sealed.

Ejected cases fell at my feet.

Again, 60 rounds isn't much of a test but I was curious to how much fouling got into the gun. When I field stripped it, what fouling that existed was concentrated at the face of the piston and the gas head. (Part 156 in the diagram in the owner's manual. PDF document.)

After getting the RDB zeroed and finishing up 60 rounds, I turned my attention to the Ruger Gunsite Scout Rifle, which is chambered in .308 Winchester. I'd mounted a Leupold 1.5-4x Intermediate Eye Relief scope in low Warne QD rings on the factory rail back in April, but today was the first time I got to try the combination.

Yes, it's a lefty, the picture ain't reversed.

I put one 20 round box of old Hansen (made by Prvi Partizan) 147 grain FMJBT through the rifle to zero it, and a few shots of Prvi 165 grain JSPs through the Ruger. I was very pleased to see that the scope was almost on right out of the box.

Ruger GSRs have the reputation of shooting 165 grain and heavier bullets better than 150s or lighter. At 50 yards the 165s were all touching.

I especially like the Leupold IER scope. It permits mounting it far enough forward to allow plenty of space for bolt manipulation while not suffering as much from the annoyances of a long eye relief scope, such as limited field of view or susceptibility to glare if the sun is behind you. It's also mounted quite low to make quick acquisition easy.

I definitely need to get both rifles back to the range for final zeroing at 100 yards, and of course to see if the RDB continues to function well. I'll be carrying the Ruger this year for deer hunting.

Kel-Tec RDB Field Stripped

This afternoon I took a few minutes, field stripped the Kel-Tec RDB, and took some pictures. The rifle's design is different enough so that I think you'll find them of interest. Clickenzee to embiggenate.

Slightly closer view of the barrel and bolt groups:

Bolt, bolt face, and extractor. Note the dual ejector plungers on the bolt face.

Piston head. It's a little hard to see but there is a weld blob on the top of the piston. Some earlier rifles left the factory without the weld, which leads to malfunctions.

The gas system.

Bottom of the handguard, showing the molded-in M-1913 rail. I have a Rogers Rail Light mounted.

Disassembly to this stage requires you to push out three takedown pins, plus one pin in the bolt carrier group. If you take down the BCG be careful. The firing pin is spring loaded and if you fail to contain it, it will launch itself several feet. (Yeah, it happened to me the first time I stripped the BCG.)

Scoped the Kel-Tec RDB

Yesterday I decided to move a scope I already owned over to the Kel-Tec RDB I bought Friday night. My Colt AR15 6721 has been relegated to backup status and was wearing an IOR Valdada 3x25mm CQB scope.

The IOR scope is built with Schott glass from Germany, has very clear optics, and a nice reticle. The 3x magnification works well from close-up to my club's longest range, 200 yards. It's also built like a brick shithouse, so I am not going to worry about BUIS.

Range report to follow as soon as possible.

Kel-Tec RDB Rifle

I did some trading last night at Surplus City and came home with a Kel-Tec RDB 5.56mm bullpup rifle. (I actually went there with the intention of ordering an FN PS90. Maybe next time.)  SC was asking $950. I traded in my CZ-52, Bulgarian Makarov, Ruger SP101, Pietta SAA, and Springfield XD-9, none of which I'd fired in years. He gave me $1000 trade in value, so I also got 500 rounds of CCI .22 Short HV to run through my Remington 550-1.

Kel-Tec gives the OAL as 27.3" with its 17.3" barrel. The weight unloaded is 6.7 lbs. The barrel is 1:7" twist. There's a long, T-marked M-1913 Picatinny rail on top but it comes without any sights. I am debating what kind of optic to mount, but it will probably be something along the lines of a 1-4x variable, not just a red dot.


The RDB is a new design, although the bolt itself is very Stoner-ish and it takes AR15 magazines. It came with one 20-round MagPul P-Mag, an owner's manual, and a sling.

There are numerous sling mounting points for the hook-style attachments. In the pic above I had it mounted as a 2-point sling but I later switched it to a single-point using the swivel located in front of the middle takedown pin.

It's a long-stroke, gas piston design. The gas is adjustable to account for variations in ammo or the amount of crud in the gun. However, reviews I've seen state that very little fouling gets into the action. Empties eject out the bottom, through a port behind the magazine well.

The action is very simple and breaks down with only something to drive out the takedown pins. (They may loosen up over time.)

As a southpaw, the best part to me is that it's totally ambidextrous except for the HK MP5-ish charging handle. It can be reversed without tools. All I had to do was field strip the rifle and then put it in the other way when I reassembled. My initial impression of the rifle is that the ergonomics are outstanding.

Because of the long linkage between the trigger and the rest of the firing mechanism, most bullpups have lackluster trigger pulls. Not so in the case of the RDP. It's actually pretty good with some takeup but it's only around 5 pounds.

Between the adjustable gas system, the lack of fouling in the action, and having the ejection port on the bottom of the rifle so gas gets vented downward, it's supposed to be an awesome suppressor host.

In typical Kel-Tec fashion, they are scarce as hen's teeth, though. Kel-Tec announced it a few years ago but they just started shipping in 2016. They are still really hard to find in shops although there are a bunch on Gunbroker.

MAC posted a nice, in-depth review of a pre-production sample on YouTube in 2015:

I should be able to take it out in the next week or two and will post a follow up after I am able to shoot it.