douglasbeasley
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- Jan 28, 2007
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What are the top loads being used in the 270 allen express (powder type and weight)?
270 allen express
- Thread starter douglasbeasley
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Fiftydriver
Official LRH Sponsor
Your not going to get much information because there are not many out there!!! /ubbthreads/images/graemlins/grin.gif
Powders for this round will be Rl-25, H-1000 and Retumbo as well as the slow ball powders such as Ramshot magnum, AA8700 and US869. WC872 is pretty slow for this case capacity which is very similiar to a 7mm STW in capacity. These would be for bullets in the 140 to 169.5 gr range.
For the lighter bullets, Rl-22 and H-4831 can also be used with good results. Just have to watch your pressures because you can pressure out in this case capacity with these powders.
Powder capacities depending on what bullet weights you use will be in the 78 to 90 grain range depending on what powders you use. The lower end will be for the faster stick powders, for heavier end for the very slow ball powders.
These are averages. Some barrels will be a bit more, some a bit less.
Kirby Allen(50)
Powders for this round will be Rl-25, H-1000 and Retumbo as well as the slow ball powders such as Ramshot magnum, AA8700 and US869. WC872 is pretty slow for this case capacity which is very similiar to a 7mm STW in capacity. These would be for bullets in the 140 to 169.5 gr range.
For the lighter bullets, Rl-22 and H-4831 can also be used with good results. Just have to watch your pressures because you can pressure out in this case capacity with these powders.
Powder capacities depending on what bullet weights you use will be in the 78 to 90 grain range depending on what powders you use. The lower end will be for the faster stick powders, for heavier end for the very slow ball powders.
These are averages. Some barrels will be a bit more, some a bit less.
Kirby Allen(50)
Ridge Runner
Well-Known Member
my stw responds very well to a charge of 872, during testing 94 gr of 872 sent a 160 nosler downrange at 3340 fps, was surprising since its only a 26" tube.
RR
RR
Fiftydriver
Official LRH Sponsor
It will work but I like to get working pressures up a bit higher with WC872 so it burns as clean as possible. Did you get much powder fouling with that load, I suspect a bit!
Just a bit on the slow side to keep pressures up there in the 65,000 psi range that is best to get WC872 to burn as clean as possible is all.
Certainly it will work well at lower pressures, just have to keep a watch on carbon fouling.
Kirby Allen(50)
Just a bit on the slow side to keep pressures up there in the 65,000 psi range that is best to get WC872 to burn as clean as possible is all.
Certainly it will work well at lower pressures, just have to keep a watch on carbon fouling.
Kirby Allen(50)
DontKickDontKill
Active Member
Speaking of WC872, just how temp sensitive is it? I was thinking about getting a 7mm Ultra Mag, and thought about this powder with the heavier bullets.
Fiftydriver
Official LRH Sponsor
It would be amazing in the 7mm RUM with heavier bullets, +175 gr would be best in my opinion but it will also work well in the 160 gr class.
It is a ball powder and as such it is sensitive to temp changes. Some do not like this but I feel the positive characteristics of this powder outway these issues.
If you want to load to full tilt pressures, have a summer and winter load, or if your like me, just load a few grains under max and be happy with that.
It is however sensitive to temp changes but no more so then any other ball powder from what I have seen.
Kirby Allen(50)
It is a ball powder and as such it is sensitive to temp changes. Some do not like this but I feel the positive characteristics of this powder outway these issues.
If you want to load to full tilt pressures, have a summer and winter load, or if your like me, just load a few grains under max and be happy with that.
It is however sensitive to temp changes but no more so then any other ball powder from what I have seen.
Kirby Allen(50)
Ridge Runner
Well-Known Member
It did in fact score me a bit when it first came to me that it was temp sensative, but further testing has shown me how it can be regulated.
I cut my powder charge 4 grains in my 7mm Allen to shoot above 75 degrees, and still shoot the same velocity, quick multiple shots will give you a heavy bolt lift in warmer temps, here's the results of my tests
7mm Allen mag all velocity's are with 160 gr accubonds and 105 gr of WC872 in a 9 twist 4 groove lilja 30" long
single didgets to 55 degrees 3470-3495 fps
55 to 75 3520-3550 fps
75-95 3650-3720 fps heavy to impossible bolt lift
JS
I cut my powder charge 4 grains in my 7mm Allen to shoot above 75 degrees, and still shoot the same velocity, quick multiple shots will give you a heavy bolt lift in warmer temps, here's the results of my tests
7mm Allen mag all velocity's are with 160 gr accubonds and 105 gr of WC872 in a 9 twist 4 groove lilja 30" long
single didgets to 55 degrees 3470-3495 fps
55 to 75 3520-3550 fps
75-95 3650-3720 fps heavy to impossible bolt lift
JS
DontKickDontKill
Active Member
[ QUOTE ]
It would be amazing in the 7mm RUM with heavier bullets, +175 gr would be best in my opinion but it will also work well in the 160 gr class.
It is a ball powder and as such it is sensitive to temp changes. Some do not like this but I feel the positive characteristics of this powder outway these issues.
If you want to load to full tilt pressures, have a summer and winter load, or if your like me, just load a few grains under max and be happy with that.
It is however sensitive to temp changes but no more so then any other ball powder from what I have seen.
Kirby Allen(50)
[/ QUOTE ]
Those are my feelings exactly....Do you happen to know if savage makes an action that is long enough to handle it?
I have been debating between a 7Ultra, and a .338 edge....I think either one would be a good long range hitter.
It would be amazing in the 7mm RUM with heavier bullets, +175 gr would be best in my opinion but it will also work well in the 160 gr class.
It is a ball powder and as such it is sensitive to temp changes. Some do not like this but I feel the positive characteristics of this powder outway these issues.
If you want to load to full tilt pressures, have a summer and winter load, or if your like me, just load a few grains under max and be happy with that.
It is however sensitive to temp changes but no more so then any other ball powder from what I have seen.
Kirby Allen(50)
[/ QUOTE ]
Those are my feelings exactly....Do you happen to know if savage makes an action that is long enough to handle it?
I have been debating between a 7Ultra, and a .338 edge....I think either one would be a good long range hitter.
davewilson
Well-Known Member
I have been debating between a 7Ultra, and a .338 edge
i've had both cartridges and the edge is by far a much better round.
i've had both cartridges and the edge is by far a much better round.
Fiftydriver
Official LRH Sponsor
DontKickDontKill,
Savage at one time offered the 300 RUM in the M111 receivers. Would work great for the 7mm RUM. They are pretty short in length for the 338 Edge with long range bullets.
I believe they have since been dropped from the line.
Kirby Allen(50)
Savage at one time offered the 300 RUM in the M111 receivers. Would work great for the 7mm RUM. They are pretty short in length for the 338 Edge with long range bullets.
I believe they have since been dropped from the line.
Kirby Allen(50)
DontKickDontKill
Active Member
[ QUOTE ]
DontKickDontKill,
Savage at one time offered the 300 RUM in the M111 receivers. Would work great for the 7mm RUM. They are pretty short in length for the 338 Edge with long range bullets.
I believe they have since been dropped from the line.
Kirby Allen(50)
[/ QUOTE ]
Thats what I was afraid of. I think I could build one single shot, but not as a repeater. If I would build either one I would shoot 160 or 175's in 7mm, and if I shoot a 338 it would be the 300SMK....So thats that. Maybe I will just use this old savage I got and build a 25 gibbs.....Now thats the ticket.
DontKickDontKill,
Savage at one time offered the 300 RUM in the M111 receivers. Would work great for the 7mm RUM. They are pretty short in length for the 338 Edge with long range bullets.
I believe they have since been dropped from the line.
Kirby Allen(50)
[/ QUOTE ]
Thats what I was afraid of. I think I could build one single shot, but not as a repeater. If I would build either one I would shoot 160 or 175's in 7mm, and if I shoot a 338 it would be the 300SMK....So thats that. Maybe I will just use this old savage I got and build a 25 gibbs.....Now thats the ticket.
