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High Pressure Loads in 700 LA

 
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  #1  
Old 03-19-2006, 04:59 PM
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High Pressure Loads in 700 LA

I am running a pretty stiff load of Retumbo in my Sendero STW. Is there anything the smith can do when I send it in to make it more able to handle these high pressure loads a little more safe?

Thanks
Big-un
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  #2  
Old 03-19-2006, 06:35 PM
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Re: High Pressure Loads in 700 LA

Yeah - Have it rechambered to 7RUM. Better than blowing the rifle apart. [img]/ubbthreads/images/graemlins/grin.gif[/img]
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  #3  
Old 03-19-2006, 07:19 PM
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Re: High Pressure Loads in 700 LA

What do you mean "Handle these high pressure loads a little more safe?"

Are you seeing problems as a result of high pressure? Only thing to really do is rebarrel with a very tight spec chamber, tighten up the bolt nose to barrel recess fit, Bush the firing pin hole for a smaller diameter pin(Helps prevent primer cratering).

Other then that, there are reasons we watch for pressure signs, to keep us out of serious trouble. No quality smith in the world will take on this job so you can up the pressure even more then you can. There is a limit in which you should load any rounds.

Take the advice offered. If you want more performance, get a bigger engine, 7mm RUM would be a decent start but there is more out there!!! [img]/ubbthreads/images/graemlins/grin.gif[/img]

Kirby Allen(50)
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  #4  
Old 03-20-2006, 06:59 PM
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Re: High Pressure Loads in 700 LA

i would say the only way to "handle the high pressure loads a little more safe" would be to put the barrel on a stronger action.

all kidding aside, back your loads off, you're heading in the wrong direction.
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Old 03-20-2006, 08:39 PM
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Re: High Pressure Loads in 700 LA

Forget doing anything to make the receiver or even the barrel stronger to handle high pressure loads safely. Your rifle will easily handle loads producing up to about 130,000 psi. They all will do that. The problem doesn't exist with the steel in the rifle.

The problem is brass cases. Nobody makes cartridge cases that handle pressures higher than about 70,000 psi. That's the point they start extruding back into the bolt face through the ejector hole/slot and expanding primer pockets such that they won't hold primers any more.

One solution is to have some high quality steel cases made that will withstand the high pressures you want. These cases won't be able to be reloaded, but at least you'll reduce the chance of having a case rupture and let high pressure gas blow back into your face and ruin your day.

A better one is to back your loads off or use a larger cartridge case big enough to get the muzzle velocity you think you need.

To answer you question: Yes, your 'smith might be able to make some steel cases for you to use......once, then throw them away.
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Old 03-21-2006, 04:57 PM
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Re: High Pressure Loads in 700 LA

[ QUOTE ]
I am running a pretty stiff load of Retumbo in my Sendero STW. Is there anything the smith can do when I send it in to make it more able to handle these high pressure loads a little more safe?

Thanks
Big-un

[/ QUOTE ]

What exactly is your load and what is it doing to case right now? I'm an long time 7STW man.
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  #7  
Old 03-21-2006, 05:17 PM
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Re: High Pressure Loads in 700 LA

[ QUOTE ]
Forget doing anything to make the receiver or even the barrel stronger to handle high pressure loads safely. Your rifle will easily handle loads producing up to about 130,000 psi. They all will do that. The problem doesn't exist with the steel in the rifle.


[/ QUOTE ]

I am NOT a gunsmith so excuse me if I'm off base here. Doesn't running 100,000psi+ loads set locking lugs back, cause metalugical stress fractures and eventual fatigue & failure? I'm guessing that your claim may have been misleading.
No flame intended.
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