High performance 7.62x39

Winchester .308" 150gr PP SP vs. PRVI .311 150gr SBT. Same powder charge. Results as shown. Higher pressure is apparent with the .311 bullet. It's overly tight in the .310 barrel and is seated more deeply. The .308 150gr could take a bit more powder to get more speed.

2470 fps muzzle speed is impressive. Hornady Load Notes lists 2100 fps maximum for their 150gr.

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This thread is an exercise in frustration. Lots of self posturing and back patting and no real reloading information. This thread should be moved to the hunting rifle forum or perhaps “off topic”. Lol!

I don’t see what the big secret is about what powder is used... or the “same charge” always being used.

I’ve looked through this thread for the last time.
 
Some adjustments with powder charges. A bit more for the 150gr PP, and a bit less for the 180gr RN. Pressures don't appear to be excessive. Results as shown.

Enhanced performance 7.62x39: either load should perform pretty good on Deer at reasonable ranges. The lightweight and balanced No.1-A is a nice rifle to carry. :)

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Slamfire said:
Winchester .308" 150gr PP SP vs. PRVI .311 150gr SBT. Same powder charge. Results as shown. Higher pressure is apparent with the .311 bullet. It's overly tight in the .310 barrel and is seated more deeply. The .308 150gr could take a bit more powder to get more speed.

2470 fps muzzle speed is impressive. Hornady Load Notes lists 2100 fps maximum for their 150gr.

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Click to expand...

There's 6 shots in your 5 shot group.
 
MuthaFunk said:
This thread is an exercise in frustration. Lots of self posturing and back patting and no real reloading information. This thread should be moved to the hunting rifle forum or perhaps “off topic”. Lol!

I don’t see what the big secret is about what powder is used... or the “same charge” always being used.

I’ve looked through this thread for the last time.
Click to expand...

Likely CFE BLK or H322. More than likely H322 with the heavier bullets and CFE BLK will bump the lighter 123/125 gr bullets faster. I have read a gun magazine article that a gun writer did for loading rounds for his 7.62X39 Howa Mini Action Bolt rifle and using those 2 powders was able to achieve great accuracy and improved velocity with the Sierra Pro hunter 125 and 150gr bullets. The Ruger #1 action would able to allow for increased rate that would account for these numbers. My guess anyway. But the OP not saying what the powder/powders are, like it is a matter of national security, is kinda pathetic. To each their own though. I will be using the CFE BLK to work up loads in my Howa 7.62X39 and see how it goes. Might get some of the H322 and try that too depending on the results of the CFE BLK.
 
It's thought that flanged rounds should be better suited for the No.1 extractor because there's more contact surface for the extractor compared to flangeless rounds. Not as close to the outer edge of the extractor groove as it's thought to be on flangeless rounds so less chance the extractor will slip off.

Not necessarily. Case head and extractor groove diameters for some rounds compared.

7.62x39: flange dia. = 0.444" / groove dia. = 0.371. Difference = 0.073"
308: 0.073"
300 WBY: 0.072"
7x57: 0.064"
30-06: 0.061"

45-70: 0.102"
30-30: 0.082"
303: 0.081"
9.3x74R: 0.068"



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Slamfire said:
It's thought that flanged rounds should be better suited for the No.1 extractor because there's more contact surface for the extractor compared to flangeless rounds. Not as close to the outer edge of the extractor groove as it's thought to be on flangeless rounds so less chance the extractor will slip off.

Not necessarily. Case head and extractor groove diameters for some rounds compared.

7.62x39: flange dia. = 0.444" / groove dia. = 0.371. Difference = 0.073"
308: 0.073"
300 WBY: 0.072"
7x57: 0.064"
30-06: 0.061"

30-30: 0.082"
303: 0.081"
9.3x74R: 0.068"



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According to George Schnerring, who was the Frankfurt Arsenal Proof House Foreman, a rimmed case is 20% stronger than a rimless case (due to the extractor grove cut).
 
Strong action. One individual got carried away. Not recommended of course. Depending on a and b dimensions, the barrel/chamber will likely yield well before rising load pressures make the brass look like that.


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All this thread shows is that the Ruger #1 is a very strong action, and we already knew that.

"Clark" is one of my heros, and while a member here, he rarely posts as of late. Severely criticized and even banned on some sites (because many people like their myths), but a real contributor and myth-buster - for example that the CZ-52 is a stronger action that the TT-33 (spoiler - it isn't).

http://castboolits.gunloads.com/sho...kes-the-Ruger-No-1-such-a-strong-action/page2

I don't own a Ruger #1, but I do have Baikal Break-Action Single Shots in both 7.62X39 and 7.62X54. These are strong rifles chambered in several rounds with SAAMI pressures in the 60K psi range. My notes are scant, but I did load the 7.62X39 up well past published loads using Surplus WC-735 (Burn Rate about H322) under a 123 gr FMJ. I used 34.0 grs and hit 2700 fps. I was aiming for low end 303 Brit MV's, even though the 303 Brit has about 50% more capacity, so I knew I'd be well above 303 Brit Start Load pressures, which sit at around 35K psi.
 
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