Get on the Shiloh forum or subscribe to the BPCN and you'll get any number of opinions on compression, drop tubing, powder settling - the need for it or not.
Most BPCR silhouette shooters go the compression/drop tube route, the amount depending on the grade and brand of the powder.
Way back when I bought my first H&R Cavalry carbine, I simply dumped in 55 grs of FFg and seated my 'as cast' 405 gr bullets, lubed with bicycle wheel bearing grease. Who knew that wasn't supposed to work?
I recall hitting anything I wanted to. Out to 200 yds off hand, no watermelon sized rock was safe!
Long gone days of innocence .....