Light Load for 1903 Springfield...Worried About Flashover

Zee705

Zee705

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Question for you experience loaders...

I loaded up some 30-06 with 46 gr. of IMR4895 (suggested starting load) behind a 147gr Campro and the fired brass looked like the primers were pushed out just to say.

I decided I would download a bit and start at 42 gr. of IMR4895. I can hear the powder moving around in the case when I shake it. Should I be worried about flashover?

Thanks....Cheers
 
Hodgdon's list reduced loads with H4895 and not IMR-4895, maybe one of the senior more experienced can comment on reduced loads of IMR-4895.

The Hodgdon's H4895 is made in Australia and the IMR-4895 is made in Canada and they are similar in burn rate but not the same powder.

The information and links below are from the Hodgdon website in blue.

HODGDON® H4895® REDUCED RIFLE LOADS
For Youth Hunting, Informal Target, and Plinking
www.hodgdon.com/wp-content/uploads/2016/11/h4895-reduced-rifle-loads.pdf
__________________________________________________________________________
Hodgdon Powder Company has found that H4895 can be loaded to reduced levels. H4895
was chosen because it is the slowest burning propellant that ignites uniformly in reduced
charges. To create reduced loads, the 60% formula is recommended.

Find the H4895 load in the Reloading Data Center for your caliber and bullet.

Take the maximum H4895 charge listed and multiply by 60% (.6). The load may
be adjusted up from there to achieve the desired velocity and accuracy.

This works only where H4895 is listed. DO NOT use in a cartridge where H4895
is not shown.

Example: 30-06 cartridge with 125 gr. Sierra SP bullet. Max load shown in the Reloading
Data Center with H4895 is 53.7 grains. 53.7 X .6 = 32.2 grains. The shooter begins
with this load, and may work up from there to obtain the desired velocity and
accuracy for his reduced load.

Call Hodgdon Powder Company if additional information is needed, 913-362-9455.

IMR® TRAIL BOSS® REDUCED LOADS
FOR RIFLE AND PISTOL
NOTE, click on the link below for specific cartridge loading data.
http://www.hodgdon.com/wp-content/uploads/2016/11/trail-boss-reduced-loads-r_p.pdf

As noted in the powder description section, Trail Boss was designed primarily for reduced loads using lead bullets in pistol
cartridges. However, Trail Boss offers superb versatility in rifle cartridges producing reduced loads using lead or jacketed bullets.
These reduced loads make firing such cartridges as the 300 Winchester Magnum or even the 458 Winchester Magnum pure fun!
Listed below we show a few examples of such loads throughout the Reloading Data Center, but the fun doesn't stop there. If you
don't see Trail Boss data for your favorite cartridge we have a formula for developing loads for all cartridges and it's simple to
follow. This formula may be used in both rifle and pistol applications:

1) Find where the base of the bullet to be loaded is located in the case and make a mark on the outside of the case at
this location. Then fill the case to that mark with Trail Boss, pour into the scale pan and weigh. This is your
maximum load. Pressures will be below the maximum allowed for this cartridge and perfectly safe to use!

2) Take 70% of this powder charge weight (multiply the maximum load from step 1 by .7), and that is your starting load.

3) Start with this beginning load and work up to your maximum charge, all the while searching for the most accurate
reduced load. Once found, the fun begins!

 
The pushed out primer just means the load is light (not hot). 46 gr will be like a mild 308.

You can download even more, if you like. No danger with 42gr., but pressures will be erratic because they are too low.

If you want to make milder ammo than 46gr, you would be better off with a faster powder, like 4198 or 2400.
 
Last edited:
Ganderite said:
The pushed out primer just means the load is light (not hot). 46 gr will be like a mild 308.

You can download even more, if you like. No danger with 42gr., but pressures will be erratic because they are too low.

If you want to make milder ammo than 46gr, you would be better off with a fatter powder, like 4198 or 2400.
Click to expand...

Ganderite

Can the OP use IMR-4895 with reduced loads like the Hodgdon's H4895 reduced loads?????
 
The rule of thumb is to use 60% of the maximum recommended load for H-4895. Hodgdon's logic is as follows . . .
"Hodgdon Powder Company has found that H4895 can be loaded to reduced levels. H4895 was chosen because it is the slowest burning propellant that ignites uniformly in reduced charges. To create reduced loads, the 60% formula is recommended."

I'm not sure why the same logic doesn't apply to IMR 4895, or any extruded rifle powder with a faster burning rate that H-4895. Although a minor sin, I tend to treat both 4895s interchangeably in the .223, .308, and .30/06, and I believe that greater pressure differences occur by switching primers, than exists between the two powders. That's not to say that I don't work up a load when changing powders that are similar, I do that even when using the same powder of a different lot number. H and IMR 4350 is also close enough to use interchangeably, but not 4831. In the bad old days we used to purchase bulk powders made in Scotland which didn't come with any load data other than a proviso that it was consistent with data for such and such a powder. In those days handloaders seemed more willing to experiment, but I don't recall hearing of problems associated with down loading except when over bore cartridges were downloaded with very slow burning propellants.
 
Well I fired about 20 round today of the reduced load and there were no pressure signs. It shot pretty soft which is what I wanted.

Thanks for everyone's input.
 
Zee705 said:
Well I fired about 20 round today of the reduced load and there were no pressure signs. It shot pretty soft which is what I wanted.

Thanks for everyone's input.
Click to expand...

It should be pretty soft, at 42 grains quickload has your maximum chamber pressure at approximately 26,000 psi and estimated muzzle velocity at 2500 ft/set
 
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