From what i have seen on the web is that for lead 28ga shells then the Vectan A0 powder would be ok but unless i am mistaken i dont think there is published data.
It is similar to Longshot Powder.
I wouldnt have thought it would be a canditate for a steel load ( ?)
I have been loading lead 28ga stuff in 21g loads with Longshot powder.
Whilst i dont think i will be loading steel in this calibre if I was i would use Lil'gun and look to one of the recipes in the advantages manual as mentioned above.
I used A0 a long time ago in 28ga lead shot when FES used to sell it, also SP2 which was very good, then PSB+2SP which I am still using up. Now It’s more a case of what you can get that’s suitable for your use, rather than what price it is. Clay and Game will be just trying to use what powders they have, but the only wads suitable for steel are the TPS non-toxic shot wads and they have none according to their website and £160.00 a thousand when last available.
So a few £ more on powder is irrelevant, better to use the powder that gives the best ballistics.
