OzFclass

Hi All
I was testing a new barrel this week with some different components and thought I’d try a ladder test.
7saum at 900 yds
Load - 180 hyb with 2209 55.3 to 56.5 in .3 gn increments.
My issue with the test was the last 4 went into approx 1”
Weird hey

Hi Tim

Wow 1.2 grains of powder and they all went into a 1 inch group !!!
I do the same but with 2 shots at each load to confirm I am not dreaming when I get groups like this.
What was your speed around the 2970 fps with that load of 09?

Looks like a hummer barrel.

Pete

Hey Peter
56.2 = 2960
56.5 = 2981
I’m guessing there won’t be a repeat of that result

I would definitely be doing a retest with a higher round count to validate

agro wrote:I would definitely be doing a retest with a higher round count to validate

For sure- early days with this barrel

Tim It was more like 4 into 1/2 inch at a 5 shot group of under 3 inch and 900. If you whant to sell that barrel I will make you a fair offer..

After 1500 rounds I’ll get back to you

Gday Tim, is the 2209 old batch or the new BTI powder?
Geoff

saum2 wrote:Gday Tim, is the 2209 old batch or the new BTI powder?
Geoff

Ok I'll bite what is BTI

dazza284 wrote:

saum2 wrote:Gday Tim, is the 2209 old batch or the new BTI powder?
Geoff

Ok I'll bite what is BTI

Ballistic temperature independence

Something added to make it more temperature stable- apparently

Yes this batch is bti

Tim N wrote:...Something added to make it more temperature stable- apparently...

Did I read somewhere that it was required to address a US ban on some chemical ingredients in the old powder?

AlanF wrote:

Tim N wrote:...Something added to make it more temperature stable- apparently...

Did I read somewhere that it was required to address a US ban on some chemical ingredients in the old powder?

Not U.S ban, but Europe and U.K ban.

Tim N wrote:Hi All
I was testing a new barrel this week with some different components and thought I’d try a ladder test.
7saum at 900 yds
Load - 180 hyb with 2209 55.3 to 56.5 in .3 gn increments.
My issue with the test was the last 4 went into approx 1”
Weird hey

Yea, if a new barrel doesnt behave properly in ladder tests early on, you are only wasting components firing more out of it.
Im after a fire forming barrel, so I will swap you a jug of powder for it if you like.

Tim N wrote:

dazza284 wrote:

saum2 wrote:Gday Tim, is the 2209 old batch or the new BTI powder?
Geoff

Ok I'll bite what is BTI

Ballistic temperature independence

Something added to make it more temperature stable- apparently

Yes this batch is bti

Interesting as the new batch I have is over a gr faster than my old batch.

If my last 4 groove bartlein is anything to go by-it sped up by over 1 gn in the first 150 rounds