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woodbutcher
Guest
Today I cleaned the chamber; nothing showed on a white cotton patch. I checked seating depth and was .010 off lands. Checked neck clearance which was .002. I backed of a full grain of powder. I fired the gun into a berm and pressure was still there. I had a slight ejector mark and a loose primer. I think I will have a 30 caliber 15 twist tomato stake for this summer. Maybe a reamer for a paper weight.
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woodbutcher
Guest
Necks are not too long. I am thinking about cutting off 1/2" off breach and rechambering. I had rather have a slight bolt click than the other pressure problems. I had no ejector marks or loose primers with the tighter chamber.
D
Dennis Sorensen
Guest
Today I cleaned the chamber; nothing showed on a white cotton patch. I checked seating depth and was .010 off lands. Checked neck clearance which was .002. I backed of a full grain of powder. I fired the gun into a berm and pressure was still there. I had a slight ejector mark and a loose primer. I think I will have a 30 caliber 15 twist tomato stake for this summer. Maybe a reamer for a paper weight.
Why don't you reduce the load until you have no pressure signs and then chronograph it?
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woodbutcher
Guest
Dennis my pact chronograph is not working properly. I am going to get a CED but for the short term I am handicapped. I am three grains under a thoroughly tested round. I know there are variiables that come into play in load development from one gun to another.
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henrya
Guest
Why don't you reduce the load until you have no pressure signs and then chronograph it?
EXCELLENT idea!!!
Just because the book says you can use "X" amount of powder doesn't make it so.
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woodbutcher
Guest
This one is not in the books. It is a round that as a lot of development behind it. There are approximately 30 guns out there shooting this load. It was developed to be an extreme high velocity round. I can just about guarantee I am no where near its potential. Maybe I have had enough of these high velocity rounds; there is always some kind of glitch. My 6brx is looking better all the time.
Do you have brass other than Norma, seems that I read that Norma is somewhat soft and don’t like high pressures. In the past I have run across a 7 Mag. and a .243 Win. with similar problems, one ended up changing the brass and the other was long necks, but then they were factory chambers. Neither were mine but I was involved troubleshooting the problem. Out of curiosity is this a Richards 300 WSM? He states it requires minus zero head space, not just sure what he means but I had a very famous barrel maker out west chamber a barrel for me that was chambered in that fashion, not sure why on a .308 Win. but would not close on a go gage. There must be an explanation for what is going on, I hope you find out and if you do I would like very much to know.
Rick
Rick
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Dennis Sorensen
Guest
Dennis my pact chronograph is not working properly. I am going to get a CED but for the short term I am handicapped. I am three grains under a thoroughly tested round. I know there are variiables that come into play in load development from one gun to another.
The thoroughly tested round was not in your rifle with your chamber, throat, bore combination. I think that is the problem...