Hodgdon.com shows a starting load of 32.8 gr of IMR-4895 behind a 100gr Speer BTSP for 2683 fps, and pressure of 42,300 CUP, with a maximum load of 35.7 gr for velocity of 2862 at 50,100 CUP. IMR-4895 is probably not the best powder for that weight of bullet in the .243 Win. A slower burning powder would give better velocity and loading density, which should give more consistent results. You might consider trying IMR-4350 or even the slower burners like H-4831 or Reloder 22.
Bullets are pretty worthless. All they do is hang around waiting to get loaded.
Posts: 515 | Location: kennewick, wa | Registered: 18 May 2004
IMR 4320 is still kinda fast for that bullet. As 2ndtimer suggested you may want to get down to the 4350 range or even slower. What loading manuals do you have?
Posts: 1205 | Location: Minnesota | Registered: 07 February 2004