09-03-2017, 12:50 AM
My understanding is that the metal composition determines the performance window which is limited to about 1000 fps. This is the range between the metal being soft enough to bend, and yet strong enough to hold together.
LFPs designed to be soft enough to open up at 1600 fps will come apart (petals break off) if you get much higher than 2600 fps. So it's a sliding scale for the velocity/range you want.
The metal composition is different between the 118 MKZ and the 105 MKZ. The 105 is harder so that is holds together a higher speeds.
The TSX was designed to hold together a 3000fps - mainly for the .308 case family of .264s
LFPs designed to be soft enough to open up at 1600 fps will come apart (petals break off) if you get much higher than 2600 fps. So it's a sliding scale for the velocity/range you want.
The metal composition is different between the 118 MKZ and the 105 MKZ. The 105 is harder so that is holds together a higher speeds.
The TSX was designed to hold together a 3000fps - mainly for the .308 case family of .264s