OzFclass

Has anybody experienced much in the way of lot to lot variation in 2209? I hear 2208 is supposed to have quite a bit in the way of variation, while others reputed to be "in the know" say thats a total load of BS. But I thought I would check about 2209 as Ive started using a bit of it now.

Maybe i,m not in the know as I have found 2208 to occaisonaly have big differences (50-60 fps in a 308). 2209 does sometimes have differences of around 40 fps with the last lots I am using (MEM5010 and 5011) being 40 fps fast than the previous lot I was using.
For instance, with 2 different lots of 2209 in my 284 Shehane, I went from 53.2gns, back to 52.6 gns to keep the same speed and tune.
With my 6.5 WSSM, I went from 44.4gns, back to 43.6gns to keep the same speed and tune.

Thanks Rod. It looks like gertrude runs similar powder quantities as my 260 improved.

Brad Y wrote:Thanks Rod. It looks like gertrude runs similar powder quantities as my 260 improved.

Yes, Ballistic twins.

BTW, someone has let me know they had bigger differences than I got with 2208 between one very slow batch and the next very fast batch.

Thought as much.

Just cracked a small bottle of 5157 after finishing my 4784. Any feed back on the new lot? Hope its about the same so I can get a big bottle once Im happy with it.

One of my club members was re-testing some 2209 .284 loads a few weeks ago. He had the rifle humming for a long time, has got a new batch of 2209, instantly lost accuracy and identified a significant difference in batch speed.

Exact figures I dont know and wont try to quote on.

Really does open my eyes as to how handy a chronograph can be. Without one your unsure if you need to add powder or take it out of the case.