Here's some more tests I performed last spring doing a direct, grain-for-grain comparison of e3 and Bullseye:
Firearm- Uberti Hombre; .357 Mag.- 4 3/4" barrel
Case- R-P
Primer- Tula SPP
Bullet- H&G #51 160 gr. SWC, ACWW, .358"
e3- 2.5 grs.; 683 fps; e.s.=50
Bullseye- 2.5 grs.; 650 fps; e.s.= 37
e3- 3.0 grs.; 777 fps; e.s.=67
Bullseye- 3.0 grs.; 730 fps; e.s.=22
e3- 3.5 grs.; 858 fps; e.s.=22
Bullseye- 3.5 grs.; 828 fps; e.s.=11
e3- 4.0 grs.; 925 fps; e.s.=48 NOTE: Likely over maximum in a 38 Spec.
Bullseye- 4.0 grs.; 897 fps; e.s.=24 NOTE: Likely over maximum in a 38 Spec.
35W