Knight "high pressure" sabots are stiffer than "regular" sabots, for obvious reasons. Their function is to hold up to, and provide a better seal for, the "magnum" charges of three 50 grain pellets, ect. I've found, by accident, that they will not produce good accuracy in my inline with the 100 to 110 grain charges of FFg that I use.

The purpose of the sabot is to seal the bore to provide movement of the bullet, and toengage the rifling while the under caliberbullet is in the bore, and impart the proper spin on the bullet. Their next responsiblity is to leave the bullet assoon as possible after exiting the bore, to avoid imparting any non-areodynamic influence on the bullet's flight. This is done with centrifical forces and with "wind" actually getting under the petals and making them peel up and off. The stiffness and design of the"high pressure" sabots going at the lesser velocities of regular charge weights makes shedding the sabot difficult and thus the sabot stays with the bullet too long. This greatly degrades accuracy.....

My "accidental finding" was figuring that "high pressure" sabots would perform like any other when regular ones weren't available to me one time. My accuracy with a proven load went in the crapper, and of course I needed to know why that was. Upon a few tripsup and down the range I discovered shed high pressure sabots that were a considerable distance down range beyond what I knew regular ones would be found....to the tune of finding them in the neighborhood of the 50 yard mark. Regular one would shed and be found in the first 20 yards or so.

Being the anyalist that I suffer being, I tried both kinds at a later date and found with the same 100 grain charge of FFg, that they were indeed not interchangable. I figure it is/was due to the fact that the high pressure sabots were staying on the bullet too long and causing the bullet to veer unpredictablyfrom its normal provenpattern of accuracy. Groups fired with high pressure sabots were in the neighborhood of 6 to 8 inches at 100 yards, where regular ones like T/C's and Hornady shot into an inch or less. This was done with a Ruger 77/50 and 240 grain XTP's.