I switched over to Blackhorn 209 from T7 pellets and I find that weighing produces the best shot after shot accuracy. When I first started working up a load, I verified by volume to be safe. The max charge for Blackhorn is 84 grains by weight which should be 120 grains by volume depending on which volumetric tube you use, which is one of the problems with volume measurements. My current charge is 77 grains (weighed in grams out to 3 decimals = 4.990) with a 250 grain Hornady SST and Harvester short sabot. I'll weigh out the charges in small glass vials before going to the range or out in the field.
The main thing about measuring by volume is to be consistent. If you tap the volumetric tube to allow the powder to settle before loading (especially blackhorn because of the cylindrical shape of the granules), you should repeat this procedure for each load to be consistent.
Last edited by JM59; 08-30-2019 at 04:20 PM.