I am in total agreement with Jones here. 5K pressure with a slow burning powder is flirting with Danger. I read a very knowledgeable report on this & in "Hindsight" it is now believed this Secondary Explosion effect was one of the major factors in giving Damascus a bad name for use with Smokeless powder. The other was loading dense smokeless with a bulk dipper.
In the early days of smokeless there was still many primers around which were rather weak, being designed for Easy to Ignite Black Powder. This may indeed have led to this secondary explosion effect when loading Smokeless which was harder to ignite.
As my personal loading has always been for hunting I do not load below 7K & more generally in the 8K range. The faster powders ignite easier & the higher pressures results in much more efficient burning of smokeless.
When I want 5K pressures I shoot Black. Just my thoughts which were asked for.
