Happy_Hunter
New member
Hi All,
I note that there are a range of powders suggested for each cartridge and bullet weight combination. I know some rifles just prefer a different powder and are more accurate with that powder but, I'm a bit confused about burn rate v's filling the case.
I got some advice from Australian ADI powders for a 270-308 x 130gr pill that said I should use 46.5gr of AR2209 on the basis that it nearly filled the case. That's fine I can understand that. I know my rifle takes a bit more than the ADI recommendation, so I ended up with 47gr and it shoots like a lazer. Fine! That works for me.
I also note in their 4th Edition handbook that ADI recommend BM2 for 22-250 x 52gr pill and they also recommend AR2209 as a great powder for 22-250 too. Now I know that different weight pills work better with different burn rate powders, but the ideal pill for most 22-250's is 55gr. So, there should not be such a huge disparity between recommended burn rates for the same cartridge and only 3gr difference in pill weights.
I've had some VERY experienced and knowledgeable people tell me that AR2206 is great in a 22-250 x 55gr pill. The powder leaves the cartridge case nowhere near full. Now these guys know what they are talking about and ADI KNOW what they are talking about. So what is causing this difference in advice.
What is the secret to all this. Is it best to fill the case with as much powder as possible using slower powerds. Or is there an unknown formula that includes twist rate, pill weight, barrell metal, cartridge capacity, intended velocity and all manner of other things that when combined together determines the best powder. I'm not asking for the formula if that be true. I'd just like to get my head around the determinates of the right powder. Its all Hoccuss Poccuss to me at the moment.
Don't get too hung up on the ADI powders I have mentioned. I note the 2005 Hodgdon manual gives nine different powder choices for a 22-250 x 55gr pill load.
Thanks guys
I note that there are a range of powders suggested for each cartridge and bullet weight combination. I know some rifles just prefer a different powder and are more accurate with that powder but, I'm a bit confused about burn rate v's filling the case.
I got some advice from Australian ADI powders for a 270-308 x 130gr pill that said I should use 46.5gr of AR2209 on the basis that it nearly filled the case. That's fine I can understand that. I know my rifle takes a bit more than the ADI recommendation, so I ended up with 47gr and it shoots like a lazer. Fine! That works for me.
I also note in their 4th Edition handbook that ADI recommend BM2 for 22-250 x 52gr pill and they also recommend AR2209 as a great powder for 22-250 too. Now I know that different weight pills work better with different burn rate powders, but the ideal pill for most 22-250's is 55gr. So, there should not be such a huge disparity between recommended burn rates for the same cartridge and only 3gr difference in pill weights.
I've had some VERY experienced and knowledgeable people tell me that AR2206 is great in a 22-250 x 55gr pill. The powder leaves the cartridge case nowhere near full. Now these guys know what they are talking about and ADI KNOW what they are talking about. So what is causing this difference in advice.
What is the secret to all this. Is it best to fill the case with as much powder as possible using slower powerds. Or is there an unknown formula that includes twist rate, pill weight, barrell metal, cartridge capacity, intended velocity and all manner of other things that when combined together determines the best powder. I'm not asking for the formula if that be true. I'd just like to get my head around the determinates of the right powder. Its all Hoccuss Poccuss to me at the moment.
Don't get too hung up on the ADI powders I have mentioned. I note the 2005 Hodgdon manual gives nine different powder choices for a 22-250 x 55gr pill load.
Thanks guys