Need pressure schooling !

[oldduc]

Instead of using jags and patches for iosso, I usually use these:

https://www.midwayusa.com/product/1255143899

There are several brands, and I usually find them locally for less than $2. They work really well by smearing the iosso on them with your finger and rolling it around. They are easy to work back and forth in a small area and seem to get into the grooves in the rifling pretty well. You could probably reuse them but they will be a black gooey mess quickly, so I use a new one every time.

 

[SavageMark]

Instead of using jags and patches for iosso, I usually use these:

https://www.midwayusa.com/product/1255143899

There are several brands, and I usually find them locally for less than $2. They work really well by smearing the iosso on them with your finger and rolling it around. They are easy to work back and forth in a small area and seem to get into the grooves in the rifling pretty well. You could probably reuse them but they will be a black gooey mess quickly, so I use a new one every time.

So there’s less pressure .01 out of the lands than .01 into the lands correct ?

 

[FrankG]

So there’s less pressure .01 out of the lands than .01 into the lands correct ?

Jamming the bullet and or getting closer to the lands will drive up pressure. That is correct.

 

[243winxb]

Internet & quickload has a bullet jammed adding 10,000 PSI?

Hodgdon data has 6mm br Rem with 107 Sierra at 29 grs Varget maximum.

Your primer flow looks like a CCI 400 primer?

I dont have one, dont load one , just saying.

I dont see a listing by SAAMI, when looking for maximum psi? Still a wildcat?

2- Rem & Norma?

Sierra load data. from https://www.6mmbr.com/6mmbr.html

 

[SavageMark]

Internet & quickload has a bullet jammed adding 10,000 PSI?

Hodgdon data has 6mm br Rem with 107 Sierra at 29 grs Varget maximum.

Your primer flow looks like a CCI 400 primer?

I dont have one, dont load one , just saying.

I dont see a listing by SAAMI, when looking for maximum psi? Still a wildcat?

2- Rem & Norma?

Sierra load data. View attachment 1122557 from https://www.6mmbr.com/6mmbr.html

View attachment 1122558

Yes , tough to find load data for 6BR Norma ! The classic load is 30g Varget with 107 . I’ve read where some say they don’t notice a pressure difference in or out of the lands but I sure did today . Had a very sticky bolt in the lands . Seated bullet .02 deeper and what a difference . Wife shot all 50 rounds and didn’t complain once about bolt lift . Hopefully things will get better now ! Thx everyone for all the help !

 

[Dusty Stevens]

Yes , tough to find load data for 6BR Norma ! The classic load is 30g Varget with 107 . I’ve read where some say they don’t notice a pressure difference in or out of the lands but I sure did today . Had a very sticky bolt in the lands . Seated bullet .02 deeper and what a difference . Wife shot all 50 rounds and didn’t complain once about bolt lift . Hopefully things will get better now ! Thx everyone for all the help !

If you go buy a very recent jug of varget beware of 30.0!!! Better start at 28 and dont load up a lot past 29

 

[SavageMark]

If you go buy a very recent jug of varget beware of 30.0!!! Better start at 28 and dont load up a lot past 29

The powder I’m using I just bought 2 weeks ago . Why do u say RECENT ?

 

[SavageMark]

If you go buy a very recent jug of varget beware of 30.0!!! Better start at 28 and dont load up a lot past 29

Just bought 400 cases so plan is to load 100 at 28.1 (Sierra accuracy load) and see how it goes. I’ve run that load before with good luck .

 

[Dusty Stevens]

Should be safe. Just dont go with the standard 30.0 and go with recent varget lots. If it was on the gun store shelf for 6mo itll be fine. It has changed and needs to be tested. @joshb warned me and sho nuff its hotter than normal

 

[Ccrider]

Should be safe. Just dont go with the standard 30.0 and go with recent varget lots. If it was on the gun store shelf for 6mo itll be fine. It has changed and needs to be tested. @joshb warned me and sho nuff its hotter than normal

So is hotter good or bad?

 

[Dusty Stevens]

So is hotter good or bad?

Its indifferent. Just shows how much it varies from lot to lot and you gotta test. Just goes to show you cant just throw a load at it and keep going like we’ve been spoiled to for many years on varget. Last years lot was close to the stockpile i ran out of from like 2001