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Cas City Forum Hall & CAS-L  |  Special Interests - Groups & Societies  |  RATS (Moderator: Mustang Gregg)  |  Topic: .25ACP Ruger New Model Single Eight. 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: .25ACP Ruger New Model Single Eight.  (Read 312 times)
Chev. William
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« on: August 17, 2016, 11:33:41 am »


I am Copying over This from the R.A.T.S. 'sign-up page to add more information over time.

I am a 'Relatively' new Ruger Shooter as I bought my First Used Ruger Revolver in late November 2015.

It is a New Model .22 CAL. Convertible Single Six that I had custom converted to a Center Fire Single Eight in .25ACP, and other Cartridges, with a 10-5/8" long barrel.

The end of June 2016 my Second Cylinder was finished by my gunsmith in ".250ALRM"; a .25ACP diameters "wildcat" of 1.250" case length.  I also have some other 'Mildcats' I can shoot through this revolver now:
"6.35x26mmSR Stewart" of 1.020 through 1.056" case length, I currently am trimming to 1.055" in my experiments.
This is the same Case length and overall length as a .22WMR cartridge and also has the name ".25 Magnum Auto" and ".25MACP".
"6.35x28.6mmSR Stewart" of 1.125" case length.  This is the Same length as the old .25 Stevens Rim Fire Cartridge.
"6.35x32mmSR Stewart" of 1.250" case length.  the same case length as the ".250ALRM" but made from a 5.7x28mm Case.
All the 'mm' case designations are Made from Resized and trimmed 5.7x28mm FN once fired Brass.
All the "inch" case designation sar e made form Resized and trimmed .22 Hornet Brass (mostly new PPU brass).

So far I have loaded 50 grain FMJ and 63 grain Lead bullets ahead of BE-86, Power Pistol, Bullseye, Or Unique.
weakest fired to date is Factory Prvi Partisan 50 grain FMJ .25ACP, and the Strongest so far is 3.0 grains of BE-86 behind ^3 Grain Lead in a .25ACP case.


Left side of my Ruger .25ACP Single Eight, with Cylinder installed.


Right side of my Ruger .25ACP Single Eight with cylinder removed and Loaded with cartridges.


Close up of the Modified 8-shot cylinder. It is still marked as '22-MAG' though.

Eventual Plans is to have four separate Cylinders, one for each basic cartridge designation/case length.

I have not yet come up with a method to remark the cylinders in their actual Cartridges without the chance of distortion.
I also have a Stevens "Favorite" converted to Center fire and use a ".25 Stevens" barrel to 'plink' with .25ACP rounds.
I can fire 6.35x28.6mmSR Stewart in it if I down load to about Trans sonic Velocities (about 1124fps).

Best Regards,
Chev. William
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Chev. William
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« Reply #1 on: August 17, 2016, 11:42:00 am »

Yesterday a Friend an dI took my Ruger Single eight, a Colt Lightening DA38 Six Shooter, and an Iver Johnson Top Break Five shooter in .32 S& W to the Shooting range along with a chronograph for a First Testing outing.

Here is a report on our day of Testing .25ACP loads:

Chronograph results of Load Testing on Tuesday August 16th 2016.
At “Angeles Shooting Ranges”.

Instrument used: ‘Super Chrony F1 Master’ with printer.

Test Firearm:
Ruger New Model Convertible Single Eight in 25ACP and .25ALRM Cartridge Chambering eight shot Revolver with 10-5/8” barrel (~12” Muzzle to Breech/Recoil Face.

Test Setup:
Positioned on “Handgun Firing line in front of Permanent Target Frame about 5 yards from long Bench Type Firing line.  Bench height about 38 inches.
A Stool was used for the Testing as a Seat for the ‘Shooter’.
Chronograph wsa Set up on a Tripod about 5 feet forward of the Firing Line.  The Remote readout and printer were positioned on the Firing line bench.
The Printer and Chronograph were operated on Internal Batteries.
Altitude = ~ 1,680 feet Above Mean Sea Level, Temperature ~100 Degrees F.

Test Results:
Comparison run employing “Privi Partisan” (PPU) Factory Loaded (Made in Serbia)  .25ACP 50Grain FMJ-RN ammunition manufactured under CIP Regulations and Controls.

Technical Information
•  Caliber: 25 ACP
•  Bullet Weight: 50 Grains
•  Bullet Style: Full Metal Jacket
•  Case Type: Brass

Ballistics Information:
•  Muzzle Velocity: 771 fps
•  Muzzle Energy: 66 ft. lbs.

Raw results(fps)
874.8; 771.8; 788.3; 913.1; 711.7; 725.1;778.3; 733.7;
742.3; 791.8; 706.4; 618.0; 691.1; 733.2; 745.7.
Max. = 913.1; Min. = 618.0; Average = 755.02, or ~755fps.

755/771 = 97.9% of stated Factory Performance (out of a 2” test Barrel) when fired from a Revolver with a 10-58” barrel. (-2.1%)

Hand Loads Tested:
#1.  50 grain FMJ-RN (Rem.), PPU Brass, WSP Primer, 2.7 grains of “Power Pistol” Propellant;
1118; 1220; 1170; 1278; 1190; 1273; 1130; 1189;
1201; 1302; 1244; 1195; 1136; 1213; 1188.
Max. = 1302; Min. = 1118; Average = 1203.1, or ~1203fps.
Calculated: 1302fps @ 17079psi and Actual 1203fps: -8.2%
 
#2.   63 grain Lead FN (Hunters supply), GFI Ni Brass, CCI SP Primer, Various Charges of “Bullseye” Propellant.
A.   1.36 +/-0.05 grains: 916.1; 876.8; 1042; error;955.5.
       Max. = 1042; Min. = 876.8; Average = 947.6, or ~947fps.
Calculated: 937fps @ 14145psi and Actual 947fps; +1.1%
B.   1.39 +/-0.05 grains: 1162; 1075; 1060; 1150; 1104. (no Tape).
.                                    : 1174 (case fail); 1056; 1030; 1129; 1288.
       Max. = 1288; Min. = 1030; Average = 1122.8, or ~ 1123fps.
Calculated: 991fps @ 14808psi and Actual 1123fps: +13.3%
C.   1.43 +/-0.05 grains: error; 1164; 1179; 1149, FTF.
       Max. =1179; Min. = 1149; Average =1164.0, or ~ 1164fps.
Calculated: 1009fps @ 15492psi and Actual 1164fps: +15.3%

NOTE:  1.46 grain data not taken/recorded.

D.   1.50 +/-0.05 grains: error; error; 1130; error; error.
       Max. = 1130; Min. = 1130; Average = 1130, or ~ 1130fps.
Calculated: 1045fps @ 16925psi and Actual 1130fps: +8.1%
E.   1.53 +/-0.05 grains: 1062; 1070; 1028; 1066; 1043.
       Max. = 1070; Min. = 1028; Average = 1953,8, or ~1054fps.
Calculated: 1063fps @ 17674psi and Actual 1054fps: -0.85%
F.   1.56 +/-0.05 grains: 1262; 1030; 1075; error; FTF.
       Max. = 1262; Min. = 1030; Average = 1122.3, or ~ 1122fps.
Calculated: 1080fps @ 18445psi and Actual 1122fps: +3.9%
G.   1.60 +/-0.05 grains: error; FTF; 1354; 1138; 1210.
       Max. = 1354; Min. = 1138; Average = 1234.0, or ~ 1234fps.
Calculated: 1097fps @ 19239psi and Actual 1234fps: +12.5%
H.   1.63 +/-0.05 grains: 1201; 1368; 1316; 1190; 1151.
       Max. = 1368; Min. = 1151; Average =  1245.2, or ~ 1245fps.
Calculated: 1114fps @ 20058psi and Actual 1245fps: +11.8%
I.    1.67 +/-0.05 grains: 1239; 1182; 1231; 1096; 1278.
       Max. = 1278; Min. = 1096; Average = 1205.2, or ~ 1205fps.
Calculated: 1131 fps @ 20696psi and Actual 1205fps: +6.5%
J.    1.70 +/-0.05 grains: 1297; 1375; 1243; 1238; 1329.
       Max. = 1375; Min. = 1238; Average = 1296.4, or ~ 1296fps.
Calculated: 1147fps @ 21760psi and Actual 1296fps: +13%
K,   1.73 +/-0.05 grains: 1235; 1338: 1209; FTF; FTF.
       Max. = 1338; Min. = 1209; Average = 1260.6, or ~ 1261fps.
Calculated: 1164fps @ 22849psi and Actual 1261fps: +8.3%
L.    1.77 +/-0.05 grains: 1229; 1257; 1232; 1289; 1276.
       Max. = 1289; Min. = 1229; Average = 1256.6, or ~ 1257fps.
Calculated: 1180fps @ 23563psi and Actual 1257fps: +6.5%
M.   1.80+/-0.05 grains: 1266; 1268; 1214; 1241; 1242.
       Max. = 1268; Min. = 1214; Average = 1246.2, or ~ 1246fps.
Calculated: 1196fps @ 24502psi and Actual 1244fps: +4.2%

NOTE:  1.84 grain Data not taken/recorded.

N.   1.87 +/-0.05 grains: 1311; 1275; 1175; 1214; Jam (not fired).
       Max. = 1311; Min. = 1175; Average = 1243.7, or ~ 1244fps.
Calculated:1227 fps @ 26357psi and Actual 1244fps: +1.4%
 


3.  50 grain FMJ-RN (Rem.); GFI Ni Brass; CCI SP primer Propellant compare:

A.   1.50 +/-0.05 grains:”Bullseye”; 1188; FTF; error; 1179; 1278.
       Max. = 1278; Min. = 1179; Average = 1215.0, or ~ 1215fps.

B.   1.50 +/-0.05 grains: “BE-86”:    1107; 1381; 996.2; 1147, error.
       Max. = 1381; Min. =996.2; Average = 1157,8, or ~ 1158fps.
     Conclusion: for the Same Charge Weight BE-86 Generates a lower Peak Pressure than Bullseye under the same conditions.

SUMMARY

     Recorded data Results seems to vary from Calculated Values by Bilateral amounts. It is probable the sample size used is not adequate.  It is also probable that the Charge Weights vary due to the Imprecise Scale used for the Charge Weight Resolution desired.
Due to the Low Value Charge Weights, in the range of 1.3 to 2.7 grains, and the marked Resolution of the Scale used, 0.1 grain, the interpolation of charges to 0.01 grain +/-0.05 grain is less than the observed variation in measured performance.  

The instrument used has a measuring base of about 1 foot and four digit readout resolution but the full Accuracy and Resolution Specifications are not known at this time.  

The factory Ammunition tested for comparison measured about 2.1% lower out of this 10-5/8” barrel compared to factory Test Barrel length of 2”.  This is quite low compared to similar Barrel lengths tested By “Ballistics By The Inch” using a Single Shot Handgun with a Locked Breech and sealed length Barrel (no cylinder gap).  They found a 10” barrel yielded Velocities about 28% increase in measured MV.

How much The Ambient temperature, and the temperature of the Instrument, which was in direct Sunlight, affected These Results is unknown at this time.

Overall, The confidence level in these results is low due to the reasons state in the summary but they ARE the Results obtained and recorded.

The Colt yielded a Louder Report and more "Kick" than my Ruger. and the Iver Johnson was in between the two others.
Later today, when it is cooler, I will be cleaning my revolvers before Putting them away until next time.

Best Regards,
Chev. William
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rickk
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« Reply #2 on: August 19, 2016, 09:57:11 am »

For cylinder marking, consider finding someone with laser etch capability.

As one of the few diehards that reload everything, including the 25 ACP, I feel your pain.

Getting 25 ACP charges to be uniform as a true hassle.   I guess if I got serious about it, I would look for a finely ground power and make myself a custom power measure that works well in the 1-2 grain range, but I don't take it that serious. I have several powder measures and none of them are really practical for 25 ACP.  In fact, I use a cut down 22 case with a wire handle soldered to it for a power scoop.

enjoy... it looks like fun !

Rick
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Chev. William
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« Reply #3 on: August 20, 2016, 07:08:49 pm »

For cylinder marking, consider finding someone with laser etch capability.

As one of the few diehards that reload everything, including the 25 ACP, I feel your pain.

Getting 25 ACP charges to be uniform as a true hassle.   I guess if I got serious about it, I would look for a finely ground power and make myself a custom power measure that works well in the 1-2 grain range, but I don't take it that serious. I have several powder measures and none of them are really practical for 25 ACP.  In fact, I use a cut down 22 case with a wire handle soldered to it for a power scoop.

enjoy... it looks like fun !

Rick

Thanks for the Kind words of encouragement.
Yes! it is Fun to fire this customized Ruger, especially with some of the Hand loads i have tried in it so far.
Higher MAP charges with 50 grain FMJ bullets do add some to the Interest.
Ditto with Charges used under 63 grain Lead FP Bullets.
One Robust one is 3.0 grains of BE-86 behind the 63 grain Bullet.
Seems to hit at around the same point as a Factory 50 Grain Bullet at about 7 yards,  I have not tried i tat longer ranges yet as I am Still learning to "hold' This Long Barrel for accuracy, I shoot it without a rest under the Barrel.

Best Regards,
Chev. William
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« Reply #4 on: August 22, 2016, 10:38:34 am »

FWIW, while I have yet to try it myself, I have heard of #3 buckshot (.251) being used in the 25 ACP for the ultimate penny pinching load.  Lube post bullet seating with Lee liquid Alox.

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Mustang Gregg
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« Reply #5 on: August 22, 2016, 02:26:04 pm »

William:

Have you tried to get "extra" cylinders from Ruger? 
The last I talked to them (2013), they would not sell a blank cylinder, because they want to fit the cylinder to the frame.
Do you have a machinist who can mill out a cylinder from stock?
There used to be one in Omaha who would make 5-shot cylinders for the big-ass cartridges like .458, .460, etc.

I still have the dream of getting a 12" K-Blackhawk in .256 Mag.

Mustang
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Chev. William
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« Reply #6 on: August 22, 2016, 02:42:15 pm »

For my Ruger "New Model Convertible Single Eight" project I bought 'replacement 22-Mag 8-shot cylinders' from "gunpartscorp.com" over time at about $158 each with the Shipping extra.  I don't know what they might have to fit your frame.

In my case, the 8-shot cylinder is drilled then reamed to .250'-.251" straight through, removing almost all of the 22-WMR chamber but leaving the rim recess outer diameter.  then a piloted chambering reamer (roughing, followed by finishing) run into the straight bores to make it suitable for the intended Cartridge: be it .25ACP, .25ALRM/6.35x32mmSR, or one of the other experiments.

Best Regards,
Chev. William

PS: I have been buying my reamers and pilot bushings from "Pacific Tool and Gauge" over the last few years (one reamer at a time).
They are in the same time zone as I am so it has made telephone conversations much easier.
Chev. William
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« Reply #7 on: August 23, 2016, 08:50:57 am »

There are people who make wildcat .25ACP/.22's.   That would eliminate the need for changing the barrel.
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