Looking for 308 reduced load info ,i have lots of speer 150 gr bulets?

Speer reloading manual # 10
sr4759
23gr =1988
21gr=1836
19gr=1654
20gr works good in kids 16" Ruger

quote:

Originally posted by boatdoc:
Looking for 308 reduced load info ,i have lots of speer 150 gr bulets?

This question would probably get more answers if we knew how reduced you want the loads to be...a wished for velocity range, for instance...

One of my favorite .308 loads is a SLIGHTLY reduced load...45.0 to 46.0 grains of H-380 behind any 150 grain jacketed bullet. That load produces only about 45,000 c.u.p. pressure as opposed to some factory loads which produce close to 55,000 c.u.p. But, it still gives 2,600 f.p.s. or slightly more muzzle velocity.

Easy on the gun, easy on the shoulder, extremely accurate, but still way flatter shooting and harder hitting than a standard .30-30 round. Perfect for the wife's deer hunting.

On the other hand, if you want about 1,600 fps with a 150 bullet, try something like 15 grs of IMR 4759......

thanks guys i'm looking for a nice soft shooting load for my 12 yr old daughter. not a hunting load but something to get her started,she is recoil sensative but very keen to try.

whats the diference between sr 4756 and sr4759?

quote:

Originally posted by boatdoc:
whats the diference between sr 4756 and sr4759?

This is from memory, so may be in error, but I hope not. I believe 4756 was originally a shotgun powder, while 4759 was always a rifle powder. IIRC, SR 4759 was actually the correct original name for 4759, not IMR 4759. (SR = Sporting Rifle, while IMR = Improved Military Rifle). Nowadays it may have become IMR, as now the company (owned by Hodgdon) is named IMR...used to be that both IMR and SR were TYPES of powders, both manufactured by E.I. Dupont.


Anyway, 4759 is bulkier, and, I believe, slower burning, It is a powder which has been discontinued two or three times and brought back again each time, due to demand primarily from cast bullet shooters.

Fourteen or Fifteen grains of 4759 would make a very nice load for your daughter's use, but I would check a loading manual before using it, You might find they recommend starting at 13 or 14 grains and working up.

Anyway, either 14 or 15 grains will fill most of a .308 case because of the fluffy bulk of the powder. That is very nice because, for one thing, it makes it pretty much impossible to double-charge the case without noticing it...if you can even get a double charge in there at all. For another thing, it means you don't get erratic burning because of changing powder position in the case at the time of firing, as happens with reduced loads of more dense powders.

Boatdoc, Richard Lee's reloading manual shows 150 gr. with 25.0 grs. of Herc. 2400 for 2215 fps, 23.5 to 26.0 grs. IMR 4227 with 2260 fps on high end, 46.0 grs. IMR 4831 for 2265 fps, and 32600 CUP, which should be a gentle load.

My favorite reduced load is for the 30-06, and is a 165 gr. cast bullet in front of 7.5 grs of Greendot for 1150 fps. It prints to point of aim at 25 yards when sighted in for 200 yards with full power loads. But it requires some case modifications in the primer flash hole.

Good luck on them.
Eterry

You got my curiosity aroused, so I went down to the shop since my last post and looked up some of my old shooting/chronographing results with the .308 and 4759.

On June 7, 1992, I tried 173 gr. bullets and 13, 14, and 15 grains of 4759 in a Remington 722 with a McMillan 22" barrel.

13 grains gave a 5-shot chrono average of 1,234.4 fps, SD of 7.5, Extreme Spread of 37 fps, with 9 shots in 11/16" at 100 yards. (I didn't fire the first shot into the group...it was used to adjust the scope to center on the target.)

14.0 grains yielded 1,322.2 average fps for 5 shots, SD of 16, Extreme spread of 79 fps...5 shot group of 7/8" at 100 yards.

15 grains 4759 gave 1,389.3 average fps, SD of 14, Extreme spread of 42 fps. Group size (5 shots) was 3/4" at 100 yards.

All of these velocities were clocked at an average of 15 feet from the muzzle, so one would have to add a bit to the velocities to come up with an actual muzzle velocity from my rifle. I used a 6' screen spacing. Velocities would probably be a bit higher with 150 gr. bullets, as their inertia would be more quickly and easily overcome at the start of acceleration.


On June 9, 1993, ( a year and two days later), I tried 18, 19, and 20 grains of 4759 with the same bullets, but did not chrono those loads. Accuracy was: 18 grs.= 1.306" 5-shot group average at 100 yards, 19.0 grains gave a .721" group average at the same distance, and 20.0 grains yielded a group average size of 0.96".


Actually, I've lots of data for actual, fired, reduced loads of other powders too, but won't waste everyone's time with it here.

With a 150gr. FMJ. and 17.5 gr. to 22.5 gr. of Blue Dot some accurate results were obtained with velocities going as high as 2200 fps..
These were all just a little sooty but not as bad as when 2400 was used. 4759 has always worked well as AC has attested. roger

quote:

Originally posted by boatdoc:
whats the diference between sr 4756 and sr4759?

The difference here is enormous!

The 4756 is a small flake like appearance, the 4759 is extruded large granular appearance.

4756 is awesome in .45 ACP +P+ type loads (among others), and the 4759 is awesome for reduced rifle loads. Roy PG steered you right.

Hodgdon offers the following data http://www.hodgdon.com/data/youth/308win_y.php and the Lyman cast bullet manual has plenty of light loads for lead bullets.

First really good ear protection. I find that noise is worse than recoil for low volume/new shooters.

Do a search here for information from Seafire on reduced loads using Blue Dot.
4759 has recently become my favorite rduced load powder in those cartridges I have loaded with it, BUT BD has produced somve VERY GOOD loads for me in 30-30 (Contender), 30-06, and 7.7X58.

30-30 with the 30 caliber 110 RN bullet and the others with 130 SSP with velocity to match the reduced recoil round put out by Remington.

The 30-30 BD load gave 2100 and change from a 14" barrel and gave complete penetration at 35 yards on a broadside shot on a small TN deer from a 94 carbine.

A hundred or two of the cheap light recoiling low noise 110-130s or a cast equivilent and then spend the good 150s to get her ready to hunt.

thanks everyone ,very good info.i really apreciate the replys.

try 13 gr or slightly less red dot.

Use Trailboss, and never look back.
I believe 13 is the number, and it will fill the case. Doublecheck.
I use Trailboss in all my reduced loads.