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Old December 31, 2017, 01:28 AM   #176
Low Friction
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The latest Hand Loader #312 has some interesting comments from Brian Pearce about 327 load velocity spread and accuracy. Worth reading.
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Old December 31, 2017, 02:22 AM   #177
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Question for ss(bunchanumbers) .... what is your data sample size ...... how many rounds are you getting "Extreme Spread off of"?
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Old December 31, 2017, 02:26 AM   #178
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Quote:
The latest Hand Loader #312 has some interesting comments from Brian Pearce about 327 load velocity spread and accuracy. Worth reading.
1. Linky?

2. A Gunrag Infomercial Writer? Really?
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Old December 31, 2017, 10:30 AM   #179
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Jim,

All averages and ES data was from a full cylinder or Seven rounds.

Sevens,

Thanks for the heads up! No visible damage to the cone but not wanting to risk damage to my gun I'll back these down to where my 75gr cast bullets are. I still plan on turning the expander down to increase neck tension in hopes of getting some consistency from the bullet. I'll try to make a reloadable 22mag load with the rest of my 60s.

Thanks!
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Old December 31, 2017, 11:22 AM   #180
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Steve, when I first began playing with .327 Federal more than six years ago, I had a fat pile of 71gr FMJ Winchester slugs available... obviously bullets meant for the wimpy .32 ACP. I have had success making ultra-cheap plinking ammo with them, but I won't send them at the warp speed their light weight will allow simply because of the warnings from the ATK techs directly to me in e-mail when I have asked for their assistance.

I would bet the 60gr XTP is a more robustly-constructed slug than a cheap 71gr FMJ, but it remains a bullet designed for sub-1,000fps ammo.
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Old December 31, 2017, 01:43 PM   #181
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Quote:
1. Linky?

2. A Gunrag Infomercial Writer? Really?
Not intended to be an infomercial. Don't want to cut/past the copyrighted content onto the forum.

He talks about primer variability impacts with 327 loads. Powder burn rate with the skinny 327 case. If you get the magazine it's worth reading.
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Old February 24, 2018, 10:03 AM   #182
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First visit here as a registered member... thanks to Sevens for calling this thread (and forum) to my attention on another one I frequent, and I am resurrecting it to see whether there is any new info out there.

I am loading to feed two 327s, a Blackhawk 8-Shooter and a custom-built stainless K-frame S&W I call "Project 616." My preferred 327 load uses Starline brass, a Winchester SP, a moderate load of now-discontinued H108, and a cast bullet from the NOE 314-115-FN mould based on Lyman's 314008. With COWW and a taste of tin they run a near-perfect 125 grains and fill my Smith's chambers almost to the very top. Of course I also have shot a bunch of 32 S&W Long and 32 H&R almost-Magnum rounds through these guns, but this thread is about the manly 327 FM, so I wouldn't dream of taking it off course!

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Old February 24, 2018, 10:56 AM   #183
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Quote:
Green Frog - I am loading to feed two 327s, a Blackhawk 8-Shooter and a custom-built stainless K-frame S&W I call "Project 616." My preferred 327 load uses Starline brass, a Winchester SP, a moderate load of now-discontinued H108, and a cast bullet from the NOE 314-115-FN mould based on Lyman's 314008. With COWW and a taste of tin they run a near-perfect 125 grains
How did you determine that load was safe for you and your guns?
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Old February 24, 2018, 07:51 PM   #184
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By extensive usage and comparison with a variety of calibers, it was determined that H108 was nearly identical to another, canister powder. Since this was all experimental on my part, I refuse to post my exact charges but I started about 5% lower than suggested starting loads on the powder manufacturer's recommended range for that powder and a 115 grain bullet and hoped for the best... of course with the massive, over designed Blackhawk, I had a little extra margin for error, and when my loads showed no signs of excess pressure, I deemed them safe for the K-frame as well. Since the powder I use is no longer available, I posted this just to let folks know about the bullet and how it could possibly be used experimentally by sufficiently experienced reloaders to make a very effective high performance heavy bullet load appropriate for their own 327. Since the caliber is being used for J-frame S&Ws and Single Six sized Rugers, I wouldn't dare suggest my loads were suitable for all 327s.

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Old July 16, 2018, 07:47 PM   #185
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CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information.

Badman bullets 100 gr RNFP polymer coated over 9.4 grains of AA#7 using federal brass and CCI small magnum pistol primers gave me a velocity of 1300 FPS.

No signs of pressure with easy extraction.

Fired from a 4" Ruger SP101.
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Old July 17, 2018, 07:27 AM   #186
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That is faster than the purchased load you wanted to duplicate. I don't believe you need magnum primers for that.
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Old July 17, 2018, 07:57 AM   #187
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Quote:
That is faster than the purchased load you wanted to duplicate. I don't believe you need magnum primers for that.
The load is what was suggested by the bullet manufacturer, so that is what I tried. The magnum primers are what I had on hand. Further testing is required for accuracy. I just thought I would share my initial data since there were zero signs of high pressure.

I agree that I need to order some non magnum primers.
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Old July 17, 2018, 04:22 PM   #188
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THE .327 Federal Magnum is a 45k PSI Max load and all Federal/Speer factory ammo is built with a small rifle primer. Evidence presented to us in the past greatly suggests that the CCI small pistol magnum primer and the CCI small rifle primer (400) are the same product in two different packages.

Your use of the CCI small pistol magnum primer is appropriate. Using a non-magnum small pistol primer in full-spec (potential 45k PSI Max pressure) .327 Federal Magnum handloads would be an error.
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Old July 17, 2018, 07:13 PM   #189
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That AA#7 load is not likely max pressure. Few, if any, loads really are. I don't use small rifle primers unless really pushing it in the load. I don't use any powder that really calls for it.

I think one might want to read Brian Pearce's Handloader article about loading the 327 Federal before being too dogmatic about what is required for the cartridge.
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Old July 17, 2018, 09:02 PM   #190
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Reading the article is a good idea, but keep in mind that #7, specifically, is a spherical powder that has been around for a while and that like other older spherical formulations, it may depend on magnum primers for the most consistent ignition. A chronograph will tell you if that is so by velocity SD.

As to pressure, the cartridge peak rating is a match to lower pressure medium power rifle cartridges, so the thicker cup may be warranted on that score, particularly if the load was developed by a small bullet maker with no pressure test equipment. You can reduce the load and work up with standard primers while watching for primer pressure signs to see if it looks at all like you might get piercing. But you also want to chronograph to see which primer gives you the lowest ES and you want to see if the magnum primer reduces powder fouling any, which is another sign it is burning the powder better. I have seen magnum primers both make things better and make them worse, so I can only recommend testing to be sure.

Incidentally, we are accustomed to speak of a load as producing a specific pressure and usually give a stated manual pressure, forgetting that those pressures are an average and the individual shot pressures that produced that average are distributed on a bell curve centered on that average, with some having higher and some having lower pressure. The importance of that is the pressure has a standard deviation associated with that curve that reveals just how far above the average an individual shot may be one time in three or one in twenty or one in three hundred and so on. So if the average is at 45,000 psi, then, by SAAMI's standard SD assumption, roughly one in six hundred will be 51,750 psi. So you want to allow that your primer may be subjected to that or even an occasional higher pressure and that you want to consider that possibility when choosing a primer cup.
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Old July 18, 2018, 07:17 AM   #191
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First of all, thanks for all the info. You guys have probably forgotten more than I will ever know.

The load data that the bullet manufacturer provided was from quick load, which I have no experience with. The maximum pressure calculated was just over 25000psi with that 9.4 grain load.
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