Thread: Best adi powder data

Greetings Forestry and All,
I have pretty much given up on using Nick Harvey's load data. During the 1980's and early 1990's Nick Harvey was the only source of data for the ADI powders other than some pamphlets from Mulwex that gave loads but no velocities. The Nick Harvey data is stated in the Warning at the start of the book to been derived from various sources without stating what they were. The data for the discontinued AR2206 appears to have copied Cyril Waterworth's 1970 loads for the earlier and non canister AR2201. The same loads still appeared in Nick Harvey's sixth edition. I assume that this data has never been pressure tested.
The data is also generic for one, sometimes two, projectile weights rather than specific to a particular projectile. This was common 30 years ago before all the trick projectiles we have today were developed. In my opinion we need to use the latest data available, specific to the projectile we plan to load. Some of this data is available on line. If the data does not support the powder we would like to use perhaps we should take that as a warning.
Much has changed in the almost 50 years since I timidly approached my first handloading for my one rifle. Armed with a can of AR2201 and a copy of Cyril Waterworth's Reloading Simplified, the only source of AR2201 data at the time, the first start loads were assembled. Things have moved on since then.
Regards Grandpamac.