With slow burning extruded powder, how compressed can you go before there are negative effects if any? I've had lots of lightly compressed loads but just curious since I'm at max charge with my 280ai with h1000, and it's slightly compressed but with zero pressure signs, wondering how compressed you can cram powder before there are negative effects such as higher extreame spreads? (assuming you stay below max pressure)

My current load- 64gr h1000
With 140 Berger vld, chronoed at 3050 fps

Hodgton website says this load is only at 58,700 psi

Will
Cramming more powder in have ill effects?