 shepheard 
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Joined: May 2008  WA, USA
 Posts: 418 Feedback: 0% (0) |
Posted: 7/21/2012 8:13:03 PM
[Last Edit: 7/21/2012 8:19:48 PM by shepheard]
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Posted: 7/21/2012 10:55:19 PM
Originally Posted By shepheard:
I have a State Arms rifle. Curious what the heaviest slugs are. Around 850 grains +/- |
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50_Shooter
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Joined: Jul 2002 CA, USA
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Posted: 7/22/2012 9:57:49 AM
If you have a 1-15 twist about 850, personally I wouldn't go heavier then a spotter tracer which is just a little lighter. If you go with a 1-9.5 then you can go heavier but you'll have to find someone to turn solids and it won't be cheap.
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Posted: 7/22/2012 6:46:11 PM
Yes, it's a heavy, stainless 30" barrel with a 1-15" twist. What kind of velocity would be achievable out of a 30" barrel with an 850gr slug?
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50_Shooter
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Posted: 7/22/2012 10:01:03 PM
Hard to say, do you have to live through it?
Me personally, I wouldn't use more then 200 grs. of powder behind a bullet that heavy. Might get you 2,300 or so FPS +/- 100 FPS. |
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Posted: 7/23/2012 12:46:42 PM
Originally Posted By 50_Shooter:
...I wouldn't use more then 200 grs. of powder behind a bullet that heavy... If the powder used was IMR5010 or WC860 I agree 1000% (I load spotters to 190) ...there are slower burning powders for heavy projo's which will allow better case filling which should, in theory, give you a more consistant pressure curve: 850 grain Solid (Barnes)
Vihtavuori 20N29 214.7 gr. 2,447 (start) Vihtavuori 20N29 238.0 gr. 2,716 (Max) |
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Posted: 7/23/2012 11:32:32 PM
[Last Edit: 7/23/2012 11:33:24 PM by OldmanFCSA]
I used 250 grains of Reloder50 behind a Lehigh 510-130 solid brass bullet that weigh 800 grains in my State Arms rifle with a 30" stainless walter Lothar barrel.
The loading is stout but shot "greens" at FCSA World Championships in Raton,NM before my trigger spring broke during Relay 4 - 3rd string on first day. In my rush to fire during record period, I put two rounds off target after wind conditions changed drastically. |
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50_Shooter
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Joined: Jul 2002 CA, USA
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Posted: 7/24/2012 12:20:47 AM
Damn, was it a compressed load?
Yeah, forgot about the VV powders, wonder which is slower burning? The VV or the RL50, guess I'll have to look it up later. |
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Posted: 7/24/2012 4:38:25 AM
Originally Posted By OldmanFCSA:
I used 250 grains of Reloder50 behind a Lehigh 510-130 solid brass bullet that weigh 800 grains in my State Arms rifle with a 30" stainless walter Lothar barrel. The loading is stout but shot "greens" at FCSA World Championships in Raton,NM before my trigger spring broke during Relay 4 - 3rd string on first day. In my rush to fire during record period, I put two rounds off target after wind conditions changed drastically. I have the same barrel. What do you figure the velocity on those is? |
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Posted: 7/24/2012 9:24:45 AM
Don't know. My chronograph has a 50CAL hole thru it lengthways.
NOTE TO SELF: Remember heigth of scope above bore of gun, allow for it when shooting (over) chronograph. |
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Posted: 7/24/2012 9:28:29 AM
Originally Posted By 50_Shooter:
Damn, was it a compressed load? Yeah, forgot about the VV powders, wonder which is slower burning? The VV or the RL50, guess I'll have to look it up later. Not quite compressed, because of long throats in both of my rifles, I seat only about 0.135" of rear driving band in mouth of case. VV is slowest, then Reloder50, then H50BMG = this is only for quality reloading powders, some others may slide in somewhere. H50BMG is the most common and most used. |
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