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Subject Topic: 30-40 Ackley Improved Post ReplyPost New Topic
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Roudy
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Posted: October 18 2011 at 8:56am | IP Logged Quote Roudy

I bought a Krag rifle that had been sporterized some time ago and just
realized that it had been rechambered to 30-40 Ackley Improved.
Some comments that I've found imply that one can use 30-06 or .308
load data for reloading. I'm a bit hesitant to do that.

The only data that I have found uses V-150 or V-160 powder. I'm not
familiar with that powder and would like to know if there is an
equivalent IMR powder.

Does anyone have load data for the 30-40 Ackley Improved?

Thanks,
Roudy

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Ranch 13
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Posted: October 18 2011 at 9:11am | IP Logged Quote Ranch 13

As with all Ackely improoved, you start with the loads for the parent cartridge and then work up to 5 percent over the maximum.
It really helps to have a chronograph when developing AI loads that way when you hit 150-200 fps over what the parent cartridge will do you know you're at a very good stoppping point.

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Roudy
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Posted: October 18 2011 at 12:52pm | IP Logged Quote Roudy

Thanks Ranch. I do have a chronograph and will use it. Didn't know it
had been rechambered when I bought the rifle, until I noticed that the
shoulder was blown forward on the spent case. Someone spent a lot
on this rifle a long time ago, wish they would have marked the
chambering on the barrel. Anxious now to find out how good it will
shoot.

Roudy

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Buffalogun
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Posted: October 18 2011 at 2:43pm | IP Logged Quote Buffalogun


Roudy,

The best I can do is to show this from P.O. Ackley's book:




I would start low and work up!



Mike

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Paul5388
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Posted: October 18 2011 at 3:10pm | IP Logged Quote Paul5388

Quote:
I would start low and work up!
Especially with the HiVel#2. I still have some, so it isn't like it's completely gone.

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Buffalogun
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Posted: October 18 2011 at 6:02pm | IP Logged Quote Buffalogun

Paul,

I think I can honestly say I've never seen a can or at least don't remember it!


Mike

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Paul5388
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Posted: October 18 2011 at 6:12pm | IP Logged Quote Paul5388

Kinda like this:

It was THE powder for .30-06 for a long time and was still listed in Speer #7.

I still haven't gotten around to loading any of that DuPont #6, but one of these days...

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Ranch 13
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Posted: October 18 2011 at 8:22pm | IP Logged Quote Ranch 13

Roudy wrote:
Thanks Ranch. I do have a chronograph and will use it. Didn't know it
had been rechambered when I bought the rifle, until I noticed that the
shoulder was blown forward on the spent case. Someone spent a lot
on this rifle a long time ago, wish they would have marked the
chambering on the barrel. Anxious now to find out how good it will
shoot.

Roudy


Roudy the smith that did the rechambering job of my 30-30 ai didn't mark the barrel either , and I'm thinking the reason is because it will still function fine with the parent cartridge, and the goofy looking case that pops out isn't a problem unless you're a reloader....

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lotech
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Posted: October 19 2011 at 5:57am | IP Logged Quote lotech

The Ackley data is very old. Many of the loads published in the Ackley books are quite stout, some to the point of being potentially dangerous, depending on the firearm. The newest Krag action is well over 100 years old. Comparatively, it is not a strong action. I've handloaded for five or six Krags over the years and have found that even some current published maximum loads may be a bit much for regular use in some rifles. With the improved version of the cartridge, you may be able to safely exceed book figures for the standard .30-40, but not by much, and that's with a properly headspaced action. Some claim cracks on the Krag's locking lug are fairly common, though I've never seen one.
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Roudy
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Posted: October 19 2011 at 7:29pm | IP Logged Quote Roudy

Thanks for all the input. I think I'll just shoot cast bullets and keep the
velocities low. Someone has done a fine job converting this old Krag
and I don't want to risk damaging it. I have other rifles to use if I need
more power.

Roudy

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M700
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Posted: October 19 2011 at 9:21pm | IP Logged Quote M700

Does the Krag have only one locking lug?

When I was a kid, one of my uncles hunted with a Krag. The action on that thing was slick!
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Roudy
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Posted: October 21 2011 at 5:31pm | IP Logged Quote Roudy

One lug on the right front of the bolt, then a lug on the right rear of the
bolt that engages on the action. Not the strongest design but the
slickest bolt action I've ever handled.

Roudy


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lwstarks
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Posted: October 27 2011 at 3:43pm | IP Logged Quote lwstarks

I have one that was converted from a norweigen (doubt I spelled that right) and only have shot cast bullets in it for the reasons given. And like yours, it doesn't say that it is an improved 30-40. I was lucky and picked up some dies for it. Before that, I had to use an old Lee loader.
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