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PostPosted: Fri Apr 26, 2019 8:22 pm 
Buckeye

Joined: Wed Oct 27, 2004 1:01 am
Posts: 1147
Location: Southwest VA USA
I posted this in the Smithing section, but I might get more responses over here.

Has anyone converted a New Model Bearcat .22 Long Rifle to .22 Magnum?


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PostPosted: Fri Apr 26, 2019 11:52 pm 
Hawkeye

Joined: Fri Apr 03, 2009 7:01 pm
Posts: 7041
Location: People's Republik of Kalifornia
Yes, and custom pistol smiths even convert to 32 H&R Magnum.

The old model cyls are not long enough for 22 Mags but close

However, they're plenty long enough for .22 WRF (Winch Rim Fire) which are back in production and cheaper than MRF. While they're velocities are not far behind MRF.

Here's my OM Super Bearcat in WRF:

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PostPosted: Sat Apr 27, 2019 1:58 pm 
Blackhawk
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Yep. Had my daughters Bearcat reamed to .22Mag years ago and shoots like a champ, also added adjustable sights.

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PostPosted: Sat Apr 27, 2019 2:44 pm 
Hunter
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Joined: Mon May 08, 2006 1:01 am
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Location: UT/AZ
When the Stainless came out I bought this one and reamed it to magnum. Neat little gun but just to small for my big o’l paw.
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PostPosted: Sun Apr 28, 2019 12:12 am 
Buckeye

Joined: Wed Oct 27, 2004 1:01 am
Posts: 1147
Location: Southwest VA USA
Thanks. I just bought a second NM cylinder from another member. I'll either rent a reamer or get Dave Clements to ream it. He lives about15 miles from me.


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PostPosted: Sun Apr 28, 2019 9:07 am 
Hawkeye
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Joined: Tue Nov 17, 2009 3:48 pm
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Location: Webster, MD.
The Shopkeeper was converted by Dave Clements. I might add that in an indoor range it produces a 'light show'. :D
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PostPosted: Sun Apr 28, 2019 9:24 am 
Hawkeye
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Location: West Tennessee
Nice!

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PostPosted: Thu May 02, 2019 9:02 am 
Bearcat

Joined: Sun Dec 27, 2009 11:49 am
Posts: 15
I have a SS Shopkeeper 3" barrel. I just had a second cylinder reamed for 22 mag. It shoots great. Does anyone have suggestions for a good cross draw holster?


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PostPosted: Tue May 07, 2019 7:55 pm 
Single-Sixer

Joined: Sun Nov 25, 2012 2:55 pm
Posts: 166
Location: Raleigh Co. WV
Nice pistols Fox Mike!!

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PostPosted: Tue May 07, 2019 9:12 pm 
Bearcat
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So, I assume the Bearcat barrels are bored to .224 right from Ruger like the Single Six convertible models?

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PostPosted: Wed May 08, 2019 5:46 am 
Buckeye

Joined: Mon Aug 25, 2008 6:59 pm
Posts: 1191
Location: S Florida
There's an easy way to tell.
If a 7/32 bit enters the muzzle, it's bored for 22Mag (.219).
If not it's .217 (LR).

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PostPosted: Wed May 08, 2019 7:37 am 
Hawkeye
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Location: Webster, MD.
BrewsterII wrote:
So, I assume the Bearcat barrels are bored to .224 right from Ruger like the Single Six convertible models?

If it is a 'new model' it is bored to take the .22WMR.

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67Z5MA2 Retired
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"Do or do not; there is no try." (Yoda)


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PostPosted: Wed May 08, 2019 7:42 am 
Bearcat
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Fox Mike wrote:
BrewsterII wrote:
So, I assume the Bearcat barrels are bored to .224 right from Ruger like the Single Six convertible models?

If it is a 'new model' it is bored to take the .22WMR.


Thank you, that is what I needed to know!

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PostPosted: Wed May 08, 2019 7:45 am 
Hawkeye

Joined: Wed Oct 24, 2007 3:17 pm
Posts: 17327
Location: Kentucky
I'd still do the drill-bit-check . . . just to be sure.

JMHO

:wink:

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PostPosted: Wed May 08, 2019 6:28 pm 
Hawkeye

Joined: Fri Apr 03, 2009 7:01 pm
Posts: 7041
Location: People's Republik of Kalifornia
The Long Rifle bore (diameter of the lands) is .222"; the WMR is .224".

A #2 drill is .221" at the cutting end and a more accurate test. And check your drill bit with a dial caliper or a micrometer. Recognize the shank of the drill bit is smaller than the actual cutting edges, so use the cutting end of a new drill.

The 7/32" (.219") drill bit is too small to discern the difference in bore sizes. It will enter a clean .222" bore.

Bearcats were introduced in 1958 so those produced before 1960 likely have LR only bores; #s A001 thru X453, and possibly later. I don't have one that early to confirm.

Super Bearcats introduced 1970 (all steel except trigger guard until 1973) all have the .224" bore.

The Single Six LR only .222" bores ended at ~ #150,000 in 1959.

All Lightweight Single Sixes have .222" bores thru #212,530 when they ended production in 1959. The S (seconds) model Lightweights assembled in 8/64 and 4/65 are all numbered below #212,530 and may have either bore because they were assembled later.

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