OzFclass

How many rounds has it taken for a new barrel to stabilize velocity on a Krieger in 308 Win?

While I cant help with info on Krieger 308s, my 2 Krieger 7mms got their velocity jump at 150 rounds, then settled down at around 200 rounds.
My Tobler and Broughton 308s both got their velocity jump at around 200 rounds and settled at around 250-300.

I let them go about 250 - 300
make sure you buy plenty of the same lot powder shane
RB

Thanks Rod, Richard
It has been awhile since I ran a new barrel in.
I have 3 barrels all on the way out.
Fitted a new 1/10 for Vicki last week and our gunsmith is fitting another to my rifle today.
I know my 223 Krieger took 350 rounds to stabilize but thought the bigger calibre was lower round count.
A few guys up here have said 200 as well and then Steve reckons that the last few Krieger's he has worked with were stable from the get go?
Hoping to have them stable for Brisbane Queens which is only 4 weeks away!!??
As well as powder [2206H doesn't seem to change much more than .2gr between batches anyway] I now buy projectiles at least a 1000 a time to have same batch.
I think the projectile batch is more important than any other as I have seen the 155 hybrids vary 50 fps between 3 batches - same powder load.

Shane,

Back in 2009, I went to Bendigo with a barrel with eighty something rounds on the clock, came second in the leadup and won the grand. Chrono velocities were consistent before & after tripping to Victoria. Then again, I've tended to be driven by a belief that the .308 Winchester is a massively forgiving & accurate calibre exampled by the fact that I've used essentially the same charge & jump for the last fifteen or so years, albeit using Molied Sierra 2155s & BJDs in both standard & HBC format.

John

johnk wrote:Shane,

Back in 2009, I went to Bendigo with a barrel with eighty something rounds on the clock, came second in the leadup and won the grand. Chrono velocities were consistent before & after tripping to Victoria. Then again, I've tended to be driven by a belief that the .308 Winchester is a massively forgiving & accurate calibre exampled by the fact that I've used essentially the same charge & jump for the last fifteen or so years, albeit using Molied Sierra 2155s & BJDs in both standard & HBC format.

John

Pretty much my findings too John.
Sometimes I think we spend more time on "developing" loads than is needed. Contrary to popular belief especially in .308 & apart from slight powder charge adjustments due to powder lot variations & COAL due to differing throat lengths what works in barrel 1 works in barrel 2. I have found this to be so for many barrels & countless rounds fired over many years. Of course there will be exceptions , every rule has these, then there is "Murphy's law" to contend with!!!:D
Keith H.