Thread: Pressure / barrel speeds?

Originally Posted by Smiddy

jeues christ that was a joke

Ha ha got ya

Haha. Probably not a good subject to joke on if you don't use emoticons

another sign is the roundness of your primer after being fired, compare it to a unfired round - it should look the same and not flat

Originally Posted by Smiddy

the first sign of pressure is usually sticky bolt lift, this is when you feel resistance when lifting the handle to extract the round

Cheers, i have gone .4 over max so far, started way back and still yet to length trim. Brass doesnt budge

@P38 Im sure it was him who posted pics of flat and crated primers

other signs a stamping on the brass, this is where the brass has "flowed" around either your ejector or maybe extractor port - you will see it on the case head - it will be shinny

i usually start 1 gr below max and work up in 1gr increments untill i hit pressure then i know where it is and can back off from there in .5gr lots

Originally Posted by Smiddy

other signs a stamping on the brass, this is where the brass has "flowed" around either your ejector or maybe extractor port - you will see it on the case head - it will be shinny

Seen that once or twice but happens with my mild loads now and then. Round smooth mark stamped on the head. Very lightly though snd not always??

Originally Posted by veitnamcam

Slower twist should be faster as not using up as much energy to rotate mass.

It is but by bugger, all according to Litzs new book, typically well under normal ES.

Ok when your brass does this
This wasn't my loading....it came with a gun I brought.....
Guy said they where all sweet, he seemed two no his stuff,
the first few where all fine
I really spat the dummy bolt lift was REALLY hard. I was glad it was in a Sako, a lesser action the results may have been a very different......
Lesson.....never use loads your given
Let's use this as a worse case example

Originally Posted by Gibo

Seen that once or twice but happens with my mild loads now and then. Round smooth mark stamped on the head. Very lightly though snd not always??

can be cause by brass being abit out of spec for your chamber, if bolt lift is good and primer ok then not to worry about
its best to do your higher end loads with brass already fired in your chamber

Originally Posted by Smiddy

another sign is the roundness of your primer after being fired, compare it to a unfired round - it should look the same and not flat

Yip ALL primers have still had the round edges like unfired. Even the ones with a mild head mark. Are ejector marks from the hooky thing due to tightness and being hard to pull out?

Originally Posted by Smiddy

can be cause by brass being abit out of spec for your chamber, if bolt lift is good and primer ok then not to worry about
its best to do your higher end loads with brass already fired in your chamber

Yip all full length sized unfired in mine is at my mild go to

Originally Posted by BRADS

Ok when your brass does this
This wasn't my loading....it came with a gun I brought.....
Guy said they where all sweet, he seemed two no his stuff,
the first few where all fine
I really spat the dummy bolt lift was REALLY hard. I was glad it was in a Sako, a lesser action the results may have been a very different......
Lesson.....never use loads your given
Let's use this as a worse case example

Nasty

Originally Posted by Smiddy

when you blow a primer............. you know you shouldn't have bought those cheap Winchester ones off trade me

Fixed