Thread: 260 Rem compressed load

Originally Posted by PipIstrelle

I quickly ran the figures through Gordons Reloading Tool , not having your case volumes at hand I used the stored averages within the programme the results will not be 100% accurate .
Predicted pressured with a C.O.L of 2.800" is 53,498psi with 104% case fill and a C.O.L of 2,700 gave 57,842psi with 107% case fill ,. Max allowed pressure is 60,191 psi for the 260 .Predicted velocities are 2800 fps and 2849 fps using a 24" barrel .
Remember , these figures are only a computer simulation and cannot replace proper load development .
Given the simulation and lack of pressure indicators all would indicate a safe load .

Hope this has been of some help .

That's brilliant thanks,coal is 2.750" and 22" barrel so somewhere between those figures which is what I put into the ballistics calculator for sighting in,my M7 seems to like them with two holes touching then the third always about 12-15mm away

GRT is easy to use even for a cackhanded Yorkshireman, such as myself. It's also free to download , but requires a PC or laptop and won't work on android.
Unfortunately I am now away from home so am unable to run it again with your specific C.O.L .

Originally Posted by Ruapehu

That's brilliant thanks,coal is 2.750" and 22" barrel so somewhere between those figures which is what I put into the ballistics calculator for sighting in,my M7 seems to like them with two holes touching then the third always about 12-15mm away

Yea same I sanded out the pressure point at the front which helped on one of mine unless it was a fluke

I did a redeux , C.O.L of 2.750 , 22" barrel . Again using average case volume from the programme, 55587 psi and 2767 fps predicted. Pressure is getting up there .

Thanks for that,I don't generally like getting to close to the edge but will fire a couple more and if no pressure signs again then should be okay,just a bit disconcerting listening to the powder crunching down