SR 4759 question

[wallenba]

This is not so much a question about the powder but I'm questioning some published data in an old T/C Contender loading book. I decided to load some gallery type loads for my 30 Herret using a 110 grain J-word sp, (mold on order for 100gr lead). The book starting load is 20.4 grains which fills the case right up to the bottom of the neck. Does that seem normal to you SR 4759 users? The Hornady manual also lists 20.4 for the same bullet. The reduced load plinker I've been loading for my much larger .308 winchester uses only 16-20 grains.

[44man]

This is not so much a question about the powder but I'm questioning some published data in an old T/C Contender loading book. I decided to load some gallery type loads for my 30 Herret using a 110 grain J-word sp, (mold on order for 100gr lead). The book starting load is 20.4 grains which fills the case right up to the bottom of the neck. Does that seem normal to you SR 4759 users? The Hornady manual also lists 20.4 for the same bullet. The reduced load plinker I've been loading for my much larger .308 winchester uses only 16-20 grains.
Yes, 4759 was designed for reduced pressure loads with a lot of bulk to fill cases farther with less airspace.
My book shows 20 as a starting load and 21 max. I don't see where it would hurt to go down to 18 gr.
You can settle it in the case by vibrating them or use a drop tube to put the powder in the shell.

[wallenba]

Yes, 4759 was designed for reduced pressure loads with a lot of bulk to fill cases farther with less airspace.
My book shows 20 as a starting load and 21 max. I don't see where it would hurt to go down to 18 gr.
You can settle it in the case by vibrating them or use a drop tube to put the powder in the shell.

Yeah, that's my thinking too as these will be just for indoor plinking. I'm looking to reduce the recoil and ''drama'' the Contender generates. My 100 gr Lyman is scheduled for delivery today, but I have these 110 J-words to use up, and the range closest to me won't allow lead anyway, plus the fact that I've been ignoring the 30 Herret for years. The science behind reducing the loads without incurring the pressure ''spike'' I keep hearing about eludes me. I'd like to find it in print and familiarize myself with it. Another concern with reducing it, is the cases are first timers, and good pressure will still be needed to fireform them. I don't crimp too much so If 18 is'nt enough I'll just pull them out.

[canyon-ghost]

The difference here is most likely WHAT you shoot the 30 Herret in. To get back to the original TC loads from the 80s, I'm using Loadbooks USA for contender.

Lead bullet loads start at 16.8 and 17.0 depending on which bullet you use. Not a lot of specs for SR 4759, just two.

[wallenba]

The difference here is most likely WHAT you shoot the 30 Herret in. To get back to the original TC loads from the 80s, I'm using Loadbooks USA for contender.

Lead bullet loads start at 16.8 and 17.0 depending on which bullet you use. Not a lot of specs for SR 4759, just two.

I only have one those manuals, but as I expand into loading for my rifle and the old Contender (Super 14, bought in 1984) I'm considering more. For years I had forsaken the 30 Herret for a 7-30 Waters (easier to load for). Now I'm way more experienced and have better tools. I've got the old yellow T/C book (Loadbooks USA 1993) but there are many errors in it. One error for the 30 Herret even gives an OAL of
2.743, thats longer than the case and bullet combined!

[canyon-ghost]

Makes you wonder who prints the stuff.

[wallenba]

Makes you wonder who prints the stuff.

My edition has that error on page 154, if you've got a newer one for that cartridge, has it been corrected? Cleary someone transfered info from the 30-30, 150 load to the Herret.

[canyon-ghost]

:coffee: Page 154 is 357 Maximum in mine. Sixth Edition, Revised April 2004. I picked up both TC Contender Volumes at a gun show from Ed's TC. I miss running back and forth to Amarillo sometimes.

Some measurements look like they were for Matchkings and spire points. Case length is shown as 1.6230" with OAL running from 2.1" to 2.7(!?!) depending on bullets. I guess VLD plays a part.

[wallenba]

:coffee: Page 154 is 357 Maximum in mine. Sixth Edition, Revised April 2004. I picked up both TC Contender Volumes at a gun show from Ed's TC. I miss running back and forth to Amarillo sometimes.

Mines second ed. revised July 1993, probably a rush job, I'll invest in new, prices look good. Thanks

[Guesser]

If you can find them, the Load data pamphlets that came with the Contender is the way to go. I have several from the late 60's and up into the 70's. I don't know when TC discontinued them, but they are great references, the data was developed with DuPont and TC and tested in their combined labs. Also, check Guns and Ammo magazine and Shooting Times archives for data, they printed a lot of info for the Contender in the 60's and 70's.

[35remington]

18-20 grains SR 4759 seems very hot for an indoor plinking load. In the Herett this will produce a lot of bang, flash and velocity. I don't know how your indoor range is built, but I hope the backstop is very stout and your sound protection is excellent, as that will make most handgun loads fired in standard revolvers seem like white mice in comparison.

[wallenba]

18-20 grains SR 4759 seems very hot for an indoor plinking load. In the Herett this will produce a lot of bang, flash and velocity. I don't know how your indoor range is built, but I hope the backstop is very stout and your sound protection is excellent, as that will make most handgun loads fired in standard revolvers seem like white mice in comparison.

One has 4, 30 yard lanes that allow up to .308 Winchester (they actually rent full auto machine guns). SR 4759 is supposed to reduce recoil and bang. Works real good in my M77 .308 with a 100 grain RNSP over 17 grains.
The published data for 30 Herret in a Contender is 21.4--21 grains, thats why I posted a question here since the .308 uses less and I already found other errors in the book. Hornady manual backs up the 21.4--21 load....so, I dropped it 10% (roughly) to 18. After fireforming these cases I'll experiment with reducing them til they are comfortable.

[TCLouis]

What about working up a load with Red Dot, Bullseye, or Unique for the indoor shooting.
My Hornady manual show fairly high velocity for the limit of indoor distance.

Someone else mentioned and I have agree, the Herrett will be real loud in the confines of an room.

Please report back with the results

[44man]

Yes, the velocity will be up there. I find 4759 the most useful and accurate powder though. I use it in my 7BR, 7R and 45-70 revolver.
The 7R with 18.4 gr will kick a 154 gr bullet out at 1633 fps.
Now for the big surprise I got looking for deer loads in the 7's, VARGET. The 120 gr SSP bullet is amazingly accurate with 32.5 gr. Hodgdon said it would not work because it is too slow but it punches 1/2 groups at 50 yards at 2175 fps from the BR. This MOA is rifled for heavy bullets and I could never get a light bullet to shoot at all until I tried Varget.
The 7R loves 34.5 gr of Varget with the 120 gr bullet.
I could live with 3 powders, 4759, 296 and Varget.
4759 is no louder then other powders, if you want LOUD---shoot 335! :mrgreen: