Yeah all of this would become more pronounced if you are pushing velocities into the “fun”zone ( ex: 6 cm above 3200
).
Yeah all of this would become more pronounced if you are pushing velocities into the “fun”zone ( ex: 6 cm above 3200
I’m looking at the 2750-2850 zone.Yeah all of this would become more pronounced if you are pushing velocities into the “fun”zone ( ex: 6 cm above 3200
BS it doesn't matter! Years ago... I did always say that the number of grooves didn't mean squat in terms of barrel life or accuracy.
Not even that fast.... I'll say starting at 3k.
I’m right around 2650-2700 currently. With the new barrel 4” longer I expect to be in the previous said range. Currently I notice no pressure signs at all, everything seems great. So when 5R rifling isn’t an option you would recommend 5 over 6 from the sounds of it. Also is there any possibility you could link some literature to the tests that you had mentioned? It would be really interesting to read them. Thank you for your input. It is appreciated.
I'm surprised it's not several times that, a burr that size with a boolit spinning maybe 250,000 rpm I'd have thought it would have had more impact.
That is my observation from my machining setup. That is why I prefer quality 4 groove blanks. Others with different setups may have a different experience. A lot of builders just ream to final headspace and don't even check......at best they might scope it and look for obvious misalignment. It takes time and effort to clean and run an indicator back in to check critical chamber areas. Some builders, knowing the customer might use a borescope nowadays are spec'ing reamers with oversized freebore diameters (most SAAMI and match reamers are +.0005" bullet diameter) to "hide" visual signs of misalignment.......leaving rifling lands through the freebore while 180 degrees opposite is cut clean.
I'd take a conventional 5 groove over a 4 or 6.
The BS part I was having fun with....
Bullets where spinning at 308k and change...
Thank you for a very knowledgeable, respectful, and informative response. I have no clue who you are but you seem like you’re a wealth of information so thank you for that.
Frank Runs and I believe owns Bartlein Barrels. You are getting the scoop from THE MAN himself.
I did a google search. It looks like he makes reusable cups and water bottles.
It's a regular thing here. Don't worry about it.
I don’t own Bartlein. Tracy does. Myself, Andy and Tracy started Bartlein together.
No worries and no need to apologize!
Hey Frank.
If I can find time and get my old scanner to work, I will try to scan some of this into PDFs.
Likewise. I want to always keep an open mind, question what I'm doing and always invite Red Teaming.
I would buy one for sure. I would buy two if he included noods! LOL.
Boots was cool to talk to! If you got him started... don't hang up the phone!
Your welcome!
^^^^ this says volumes if you guys are not paying attention.....
Thanks! That's really interesting, it looks like there might be something there at 180 degrees opposite as well. I am going to have to slug some barrels and see if I can create a burr like that in a static test.
Don't get too hung up on this. Most builders (myself included) may have preferences that work slightly better with our particular setups.....but by no means are we putting out substandard work otherwise. As pointed out here, there are many more influential variables that can be (and should be) chased instead.
