Friday, October 31, 2014

Single Seven - Over the Chronograph

Data for the 327 Federal Magnum is not as extensive as I'd like it to be so I've had to use what I've had.  Double checking data and working up loads incrementally are basic safety practices that I've used for decades.  I would recommend you do the same.

32 H&R Magnum Loads
A load that shoots very well in my Single Six has also proven to shoot well in the Single Seven.  That is a starting level load of W231 under a 100 grain RCBS 32-98 SWC.  The Single Seven averages 860 fps with this load, the S6 with the same barrel length averages 854 fps.

The Lil'Gun Max load under the RCBS 32-98 SWC averaged 1287 in the S6 and the S7 spit them out at 1315 fps. Another very accurate load in both guns.

Unique at a smidgen under the Oregon Trail data MAX for a 115gr bullet, using lighter the RCBS 32-98 SWC instead averages 1061 (about the same as the Single Six) and is impressively accurate.  For general purpose work this is a great choice for the 32 H&R magnum and might be even better with the 115 grain Lyman bullet.

-A Georgia Arms factory load using the Hornady XTP bullet averages just under 1200 fps in both guns. It has a loud(er) bark and the primers are well flattened. Accurate in both guns.

327 Federal Magnum loads
I don't have a lot of 327 data for 115 grain bullets.  What I did have listed W231 (and SR4756).  Using the Lyman 311008 I worked up to the published max W231 load.  The average velocity was 1230 fps which is within 1% of what is predicted by Hodgdon data. Very good accuracy and consistent velocities.  There are NO obvious pressure signs.  Easy extraction, primers nicely rounded.

At the Hodgdon Max loading for SR 4756 for 115 grain cast bullets the average velocity was 1118 fps.  Disappointing speed wise but an accurate load.

AA#5 at a bit under the posted max gets 1264 fps average with the Lyman 311008 and shows some serious promise accuracy wise.

Using Lil'Gun with the RCBS 32-98 SWC at the starting load averaged 1309 fps. I also tried the 115 grain Lyman 311008 with that load and it averaged 1361 fps.  Going a little further off the reservation (+ half grain) with the Lyman bullet the velocity averages 1420 fps.  I suspect that load is 100% of case capacity using that bullet or very nearly so.  Accuracy was good. I'm starting to see the primers getting a little flattened, nothing like the factory loads but not soft rounded edges of the other loads. At this level the Single Seven is bucking a little bit and the muzzle flash and blast is more noticeable,  comparable to hot 357 loads in bark though tamer recoil wise.

The two factory 327 loads I've tried are both from Federal (American Eagle).  The 85 grain JFP averages 1389 fps while the 100 grain JFP averages 1483 fps.  Accuracy wise I would give the nod to the heavier 100 grain load.  At 7 yards the 100 grain load prints 1" lower than the 115" cast loads traveling 200+ fps slower.

The Single Seven will accept and function with an OAL of 1.500". The two cast bullets I'm using are loaded to 1.475 for the RCBS and 1.485" for the Lyman bullet.  This requires crimping onto the driving band as the OAL would be too long if crimped below it.  At 1.450" the bullet can be crimped ahead of the driving band. 

The velocities some are getting in their Blackhawks may be out of reach in this little gun.  I am already into the velocity realm of my general purpose 32-20 rifle loads with the same Lyman bullet which has proven to be a very capable round both in punch and range (600 yards). It will be fun to find out how far the Single Seven will reach...

Single Seven Production numbers

PostPosted: Thu Oct 30, 2014 9:33 am 

Joined: Thu Jun 02, 2011 8:34 am
Posts: 186
Location: Baton Rouge, LA
Initially, 1000 4-5/8", 1000 5-1/2" and 500 7-1/2" guns. Once those are all delivered we can re-order if the demand is there and it looks like it is right now.

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Wednesday, October 22, 2014

The Single Seven - First Impressions

Spoiler Alert: I like it.


The Ruger's Single Seven has exceeded my (high)expectations and was well worth the (difficult) wait.

I had a pretty good idea of what to expect.  I have a 32 H&R Single Six and a 327 SP101, both of which I really like.  Like every other Ruger I've ever owned the Single Seven arrived ready to go to work.  Not so refined that I would be afraid to use it, but very handsome in my opinion.  Rugged and solid feeling.  Tolerances all checked out.

A quick stop by the range demonstrated some real accuracy potential.