Thread: 30-40 krag load data

Hi all. Anyone us 30-40 krag load data for 303? If so, what's the outcome? Thanks

and WHY pray tell us would you want to do that????

Just half changing the topic...

.30-40 Krag in .303 British

Greetings @Three O'Three,
There is plenty of data for the .30-40 Krag. Hodgdon has plenty on their load data section. I have both .303 and .30-40 rifles and the data is quite different with the Krag being held to lower pressures. If you have some specific queries I can probably help you with them. I have some pressure tested data for it.
Regards Grandpamac.

Originally Posted by Cordite

Just half changing the topic...

.30-40 Krag in .303 British

I have done it the other way.
GPM.

Originally Posted by grandpamac

Greetings @Three O'Three,
There is plenty of data for the .30-40 Krag. Hodgdon has plenty on their load data section. I have both .303 and .30-40 rifles and the data is quite different with the Krag being held to lower pressures. If you have some specific queries I can probably help you with them. I have some pressure tested data for it.
Regards Grandpamac.

@grandpamac. Primarily cast load data, 160 and 210gn bullets.

fill case with black powder....job done.
10grns of unique...job done.........check this"universal load" for yourself,verify if you believe its safe.
trailboss....70% of normal load volume job done.

any other load data that will get you down below about 1800fps...job done..2206 might be your friend...

page 76 1994 handloaders digest
i have loaded gascheckdesign bullets for yearswithout the gascheckfor years in just about any 30cal rifle using 7 grains of lmost any fast-burning pistol powder including but not limited to....bullseye,w-231,green do,red dot hi skor .700x,I have also had fine results with8-9 grns of medium burning rate pistol or shotgun powders such as unique,pb,herco,sr-7625 or sr7625 in any case of 30-40 crag size or larger.
talking about 160-180grn cast projectiles....

Originally Posted by Micky Duck

and WHY pray tell us would you want to do that????

Yes agree. Why would you three o three?

for game 16grns hercules24000 giving 1500fps under 180grn cast in almost any military calibre,,,,can sustitute hercules with....17grns of4227,either imr or hodgdon
18grns of H 4198
21grns of RL--7
or 25.5grns of h4895 for comparable results............ from same source,(that last one may be gold.)

Originally Posted by Three O'Three

@grandpamac. Primarily cast load data, 160 and 210gn bullets.

Greetings @Three O,Three,
My old Lyman manual gives some uefull data. Barrel length is 22".

For the 155 grain cast which would be close to your 160 grain:
Start 19 grains of IMR4227 for 1,628 fps
Max 24 grains of IMR4227 for 1,934 fps
Max for 150 grain Speer jacketed from IMR data is 23.5 grains of IMR4227 for 2,090 fps at 37,700 CUP.
Start 24 grains of IMR4198 for 1,818 fps
Max 28 grains of IMR4198 for 2,032 fps
Max for 150 grain Speer jacketed from IMR data is 30 grains of IMR 4198 for 2,355 fps at 39,600 CUP.

For 231 grain cast
Start 17 grains of IMR4227 for 1,413 fps
Max 22 grains of IMR4227 for 1.689 fps
Start 21 grains of IMR4198 for 1,554 fps
Max 25 grains of IMR 4198 for 1,769 fps

I don't have pressure data for the 220 grain projectile but max for the 180 jacketed is 23 grains of IMR 4227 and 29.5 grains of IMR4198.

I have used 32 grains of AR2206H with the 150 grain jacketed in my .30-40 Martini which worked well but 28 grains smoked thw cases full length IMR gives 36 grains of IMR4895 as max for 2,435 fps and 39,700 CUP. These have not been shot over the chrono yet.

With ADI powders AR2205 is close to IMR4227, AR2207 close to IMR4198 and AR2206H close to IMR4895.

Questions welcome.
Regards Grandpamac.

Some more dinner recipes for the krag. These from the lyman 43rd edition. Imr 4064 is close to ar 2208.
Interestingly the loads for krag, 308, 3006 and 303 in the cast bullet section are all within a grain of each other. I suppose it shows that with cast bullets at lower speeds there's a wide range of powder charges that work, it just depends on how fast you want to push things.

Greetings again,
One more thought. What is the barrel twist on your rifle. A number of Lee Enfields were re barrelled in NZ using take off target barrels. These could have a twist as slow as 1 in 14' which may struglle to stabilise the heavier projectiles, Original Krag twist was 1 in 10"
GPM.

Originally Posted by grandpamac

Greetings again,
One more thought. What is the barrel twist on your rifle. A number of Lee Enfields were re barrelled in NZ using take off target barrels. These could have a twist as slow as 1 in 14' which may struglle to stabilise the heavier projectiles, Original Krag twist was 1 in 10"
GPM.

As far as I know its a 1:10 twist.

Thanks everyone for the info. I only have ap70n so out of all the powders listed, unique loads is probably the only load I can use?