Looking for a reduced load for ADI 2207 for ,45-70

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Looking for a reduced load for ADI 2207 for ,45-70

Post by Jackaroo » 29 Sep 2022, 11:25 am

Looking for a reduced load for ADI 2207 for ,45-70 and 500gr pill (lead RN HiTek).
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Re: Looking for a reduced load for ADI 2207 for ,45-70

Post by bladeracer » 29 Sep 2022, 12:30 pm

Jackaroo wrote:Looking for a reduced load for ADI 2207 for ,45-70 and 500gr pill (lead RN HiTek).


How far reduced? Subsonic?
ADI list 28gn behind 485gn cast at 1280fps up to 32gn making 1430fps.
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Re: Looking for a reduced load for ADI 2207 for ,45-70

Post by Jackaroo » 29 Sep 2022, 12:43 pm

bladeracer wrote:
Jackaroo wrote:Looking for a reduced load for ADI 2207 for ,45-70 and 500gr pill (lead RN HiTek).


How far reduced? Subsonic?
ADI list 28gn behind 485gn cast at 1280fps up to 32gn making 1430fps.


I'd like to be as low as possible and stay around 28gr of 2207, is it negligible the difference between the 15gn of a 485gn & 500gn pill when reading reloading manuals and loading at the bottom end of the scale?
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Re: Looking for a reduced load for ADI 2207 for ,45-70

Post by bladeracer » 29 Sep 2022, 1:20 pm

Jackaroo wrote:
bladeracer wrote:
Jackaroo wrote:Looking for a reduced load for ADI 2207 for ,45-70 and 500gr pill (lead RN HiTek).


How far reduced? Subsonic?
ADI list 28gn behind 485gn cast at 1280fps up to 32gn making 1430fps.


I'd like to be as low as possible and stay around 28gr of 2207, is it negligible the difference between the 15gn of a 485gn & 500gn pill when reading reloading manuals and loading at the bottom end of the scale?


Yes, the actual alloy, bullet diameter, lubricant, seating depth, crimp and loading technique will have more bearing than the 15gn difference in bullet weight. These variables will also effect the velocity you get in your rifle with these loads.

You're not looking at the bottom end of any scale, that is just a convenient point they offer for you start your load development at, that's why it's called a "starting" load. You can go work up or down from there to suit your purposes. Some load data don't even bother with starting loads, they just list their maximum load and warn you to start 10% lower than that - Alliant for example. Subsonic is likely to be around the 25gn region.
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Re: Looking for a reduced load for ADI 2207 for ,45-70

Post by Jackaroo » 29 Sep 2022, 1:57 pm

bladeracer wrote:
Jackaroo wrote:
bladeracer wrote:
Jackaroo wrote:Looking for a reduced load for ADI 2207 for ,45-70 and 500gr pill (lead RN HiTek).


How far reduced? Subsonic?
ADI list 28gn behind 485gn cast at 1280fps up to 32gn making 1430fps.


I'd like to be as low as possible and stay around 28gr of 2207, is it negligible the difference between the 15gn of a 485gn & 500gn pill when reading reloading manuals and loading at the bottom end of the scale?


Yes, the actual alloy, bullet diameter, lubricant, seating depth, crimp and loading technique will have more bearing than the 15gn difference in bullet weight. These variables will also effect the velocity you get in your rifle with these loads.

You're not looking at the bottom end of any scale, that is just a convenient point they offer for you start your load development at, that's why it's called a "starting" load. You can go work up or down from there to suit your purposes. Some load data don't even bother with starting loads, they just list their maximum load and warn you to start 10% lower than that - Alliant for example. Subsonic is likely to be around the 25gn region.


I think from looking at my reloading books and researching online, anything below 28gr (ADI 2207/H4198 and close but not exactly the same IMR4198) need a dacron (or the like) filler or some people I've read will use a small square of toilet paper.
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Re: Looking for a reduced load for ADI 2207 for ,45-70

Post by bladeracer » 29 Sep 2022, 2:13 pm

Jackaroo wrote:I think from looking at my reloading books and researching online, anything below 28gr (ADI 2207/H4198 and close but not exactly the same IMR4198) need a dacron (or the like) filler or some people I've read will use a small square of toilet paper.


Probably not necessary but you can certainly try it, magnum primers might help also.
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Re: Looking for a reduced load for ADI 2207 for ,45-70

Post by dnedative » 29 Sep 2022, 9:04 pm

Shouldnt need to, but perfectly safe to use dacron. I've used it in smokeless 45-120.
Lyman recommend for a #457125 28.5 to 31.5gr AR2207.

The ADI data for 45-70 trapdoor loads is pretty wild, they are SAAMI loads but not a f***ing chance I would use some of them in an old trapdoor or rolling block made in the 1800's. The receivers were at best case hardened mild steel. The hottest black powder pressure test load I have data on is 535gr bullet over 60gr of FF @ 14,600CUP. ADI recommend loads running 28,000CUP specifically for trapdoor springfields lol
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