Re: Real World VS Loading manuals
There are so many varibles when dealing with 7 mm Rem Mag rifles .
Case capacity , chamber -throat differences ,barrel diamensions,bullets all change pressure and the velocity .
See the 7 mm Rem data in the Speer manuals .
Both rifles shot with H-870 powder, ww brass , Fed 215 Primers ,160 Nosler .025 jump to lands.
One older Ruger 77 would not shoot 160 Nosler faster than 2950 but the best 3 shot group was .2 at 100 yards .
Another Ruger M77 with the 160 Nosler and H-870 using 80.5 gr would cronograph at 3075 fps at 32 degrees.
The companys that write the loading manuals have much experiance and equiptment to test the loading data.
Unless you have Pressure Trace strain gauge system and Quickload to meaure pressure in your gun load by the manuals and be very carefull.
What velocity do you get with the Federal factory loads?
Last edited by Stonewall2; 08-20-2010 at 10:25 AM.