Another 25cal TMK Thread

[Superior Gun Works]

Going to get started on these this coming weekend, but getting the thread started. Take the information as it is, for what its worth as an example.

THIS IS MY RIFLE, MY BARREL, MY CHAMBER JOB, MY ELEVATION, MY ATMOSPHERICS, MY PRIMERS, MY POWDERS, AND ITS NOT GOING TO BE THE SAME AS YOURS, YOUR BUDDIES, THE DUDE DOWN THE ROAD, THE THREAD YOU READ ON THE INTERWEBS, YOUR COUSIN'S SISTER ETC....

 

[Justin Crossley]

What are you loading them in and what is your expected velocity?

 

[Superior Gun Works]

What are you loading them in and what is your expected velocity?

Starting with a 20" 25prc......should be 3-3100. I am guessing they will run similar to the 134's

 

[Ucsdryder]

Starting with a 20" 25prc......should be 3-3100. I am guessing they will run similar to the 134's

That’s smoking fast. I couldn’t get anywhere close to that with 134s in a 22” barrel. Are you seeing those speeds or hoping?

 

[Superior Gun Works]

That’s smoking fast. I couldn’t get anywhere close to that with 134s in a 22” barrel. Are you seeing those speeds or hoping?

138's are 3040's and 134's are 3080 as its ran now.............plus p(ish) throated. Slight extractor mark but no lift or click.

 

[Ucsdryder]

138's are 3040's and 134's are 3080 as its ran now.............plus p(ish) throated. Slight extractor mark but no lift or click.

What powder?

Ejector marks on first firing of brass? My guess is when you get to 2nd or 3rd reload it’ll get worse. I think you’re way over. Be careful.

 

[Dave Thomas]

Is that off the 6.5 or 7 prc case?

 

[Superior Gun Works]

What powder?

Ejector marks on first firing of brass? My guess is when you get to 2nd or 3rd reload it’ll get worse. I think you’re way over. Be careful.

I dont know what to tell you man. Maybe your crap is slow maybe my crap is fast. Its not my first day doing any of this. I have a pretty good grasp on what is a little and what is too much pressure. This wouldn't even show on a big action vs the Tikka. The particular barrel (with a plus p throat) that I am currently using, which could vary greatly from the one you have, will run this window with h4831, 560, and 570. I did all initial testing with powders on the same 10 sticks of brass to see if it was going to hang in there.

FWIW all my barrels are Pac-nor 7.5t Plus P'd. Even my little 25 predator case (50-52gr) at 22" runs low 3000's with 134's all 3 of them. Also Run a 24" 25 sherman (formed 280ai case) and it runs 3320 with the 134. The Prc tracks speed wise with barrel length vs powder.

Thanks for looking out.

 

[Superior Gun Works]

Is that off the 6.5 or 7 prc case?

6.5

 

[Superior Gun Works]

So it begins. Going to work this in between customer stuff today and see what happens. Spun the 25prc barrel on the tikka and took some measurements.
If anyone cares here is how the berger 133 and 135, hornady 134 and 138 compares to the 135tmk.

 

[T_Widdy]

So it begins. Going to work this in between customer stuff today and see what happens. Spun the 25prc barrel on the tikka and took some measurements.
If anyone cares here is how the berger 133 and 135, hornady 134 and 138 compares to the 135tmk.

Is the coal pic where they all touch the lands at

 

[Superior Gun Works]

Initial push with powders. This rifle still likes what it likes powder wise and the TMK didnt change this. Seems to be a little slipperier than the 134.

 

[Superior Gun Works]

Is the coal pic where they all touch the lands at

Yes Sir...........In my rifle