Sorry for the long delay…
I run 124 gr JHP\’s (nukes and the previous MPR\’s) with 5.4 gr. Silhouette, at 1.075\” and it gives me consistent chrono readings of 1050-1075 fps in my 4 and 4.25\” barrels.
I could run them longer as some have mentioned, but this works in every gun I\’ve ever loaded for and is a very soft shooting and controllable load. Yes pressure increases as OAL decreases but 1.075\” fits most book data for 124 gr. JHP\’s and isn\’t considered \”short.\”