Tag Archives: 10mm

Improving the Feed Reliability of the Rock Island 52000 10mm 6″ High Cap Pro Match Pistol

As some of you may know from a previous post I did, my Big Rock would not feed Underwood 10mm ammo.  Neither Armscor/Rock Island nor Underwood helped resolve my issue though Armscor did take the pistol back and tell me there was nothing wrong with it – probably with FMJ ball ammo.

At any rate, the solution came from a discussion with my friend and FFL, Scott Igert, of Modern Antique Firearms, about the mechanics of the 1911.  A lot has to come together correctly for a 1911 pistol to work correctly.  In watching the pistol jam, I could see that it always hung on the pronounced shoulder edge of the Underwood 10mm ammo right on the edge of the chamber.

Any 10mm ammo that did not have that pronounced shoulder fed just fine.  In doing some digging, I elected to do two things.

First, I polished the feed ramp.  To do this, I fieldstripped the Big Rock and removed the barrel for easy access.

I then used my cordless Dremel with with a felt bob and Flitz polish to give the feed ramp a mirror polish.

Second, I used one of the fine rubber POLISHING tips in my Dremel to polish the edge all the way around the chamber.  To be clear, I am talking about light polishing and not removing a ton of material.  Do not use a sanding wheel or you may take off too much material in the blink of an eye.  Take your time and be patient.  My goal was to enable the 10mm case’s shoulder to slide over and into the chamber vs. hanging.  My recommendation is to always go light, test and repeat as needed.

After the polishing, I then used some of the big 10mm cleaning Q-Tips called “RamRodz” repeatedly along with visual inspection to make sure all the grit was gone and not mess up the testing.  Yeah –the RamRodz look goofy because they are huge and caliber-specific but they sure make cleaning easy.

For me, it just took one try – even I was surprised.  Whatever the case was catching on was either gone or rounded over.  The feed problem was solved – round after round cycled perfectly with no more jamming.

A few months after this I decided to sell the Big Rock to move on to other projects.  I can’t say that Armscor’s support impressed me given I had one of their top of the line pistols.  I gave them a very elaborate explanation of what was happening and they did not resolve the problem whereas a good talk with someone with a lot of 1911 knowledge, Scott, did.  It definitely shows there are benefits to having a smart friend.

In closing, I will go back to a recommendation I always make.  Before you rely on a pistol, definitely practice with the ammo you plan to use to make sure everything works the way you want.  The Big Rock liked S&B FMJ, SIG HPs and further crimped Underwoods from Scott but not the factory-direct Underwood 10mm ammo until I did the above tuning.


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Dremel 8220-2/28 12-Volt Max Cordless Rotary Tool with 28 Accessories (Tools & Home Improvement)

The Dremel 8220 variable-speed cordless rotary tool offers the highest performance and versatility of all Dremel cordless rotary tools. The strength of its motor facilitates maximum performance at all speed levels. The ability to use all existing Dremel accessories and attachments allows the Dremel 8220 to complete a wide range of projects. A slim ergonomic body provides a 360-degree grip zone for control in any position. Powered by 12-volt max lithium-ion battery technology, the Dremel 8220 has a 33 percent longer run-time than the Dremel 8200 cordless rotary tool when cutting screws.

Features:

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  • High-performance motor designed for demanding applications
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Dan Wesson Bruin First Look – A 6″ 10mm Refined Power House

As part of my foray into 10mm pistols, I picked up a Dan Wesson Bruin with the help of Scott Igert of Modern Antique Firearms.  The Bruin intriqued me based on reviews and that this was a Dan Wesson pistol!  I have liked Dan Wessons since the days they made the revolvers with exchangeable barrels.  Not too long go they were acquired by CZ  but the quality is still there based on everything I have heard.  I sure liked their Titan but at $4-4,200, it was way, way outside my price range compared to the $1,800 Bruin.

Now I bought the Model 1880 10mm Bronze Bruin before my Big Rock because we found it first and the more I read, the more I wanted to get one.  In my opinion it is excellently built. Here are the off-the-shelf specs:

  • Magazine Capacity:  8 rounds
  • Frame:  Forged Stainless
  • Overall Length:  9.7″
  • Barrel Length:  6.03″
  • Width:  1.5″
  • Weight:  2.74 pounds
  • Trigger:  Single Action
  • Front Sight:  Tritium Fiber Optic
  • Rear Sight:  Adjustable Night Sights

When the pistol arrived, Scott, his cousin Andrew and myself were all very impressed. It was coated in a ton of oil in a bag but the first thing we all noticed was how smooth it was – no grittiness anywhere. She slide and trigger were all so slick.  The trigger is probably the best feeling of any pistol I own.

I field stripped the Bruin, wiped off the packing oil, lubricated it and took the pistol to the range. It shot like a dream. No problems of any kind with 180 grain S&B FMJ loads or either 155gr or 180gr JHP loads from Underwood. The Bruin handled everything smooth as silk and its weight really made recoil a non-issue. It’s there but it’s not a big deal is how I would describe it.  Normally my carpal tunnel will act up and tell me when recoil is too much but I really just had fun.  I’m so used to having to fiddle with guns that when one works just the way it should out of the box, it is a real treat.

Given the magazine capacity, I went ahead and bought two more magazines giving me a total of four mags. Interestingly, the website said they were out of stock but when I called their parts department they said they did have them and the gentleman I talked to mentioned that the website quantity onhand vs. actual wasn’t that reliable.  So if you need mags, call them.  Don’t just go by the website plus they have mags both with and without the rubber bumpter. I like the bumpers personally – they add a bit of weight to help the empty mags drop plus help protect the floor plate when they hit the ground.

One little detail I really like is the extended slide release lever.  It has a little extended shelf that gives you a tad bit more leverage to push down and release the slide despite the heavy recoil spring.

Obviously I am  a big fan of this pistol.  I do have one con to mention – the Bruin has a distinctive angled front barrel plug that makes field stripping a bit tricky as you try and get things lined up. To be honest, I would chuck that angle and field stripping would become much easier.  That is my only complaint.

At this point I am debating whether to keep the Bruin, the Big Rock or both,  It may take me a while to decide 🙂  The Big Rock is a wicked brute and the Bruin is very refined.  Both are better pistols than I am a shooter so more thinking is required. In the mean time here are some photos:


If you find this post useful, please either buy something using one of the links to eBay and Amazon or click one of the AdNow advertisements. EBay and Amazon you need to buy something, AdNow pays for each link you visit – no purchase needed. Doing so will help us fund continued development of the blog.