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Posted: 9/21/2013 6:24:51 PM EDT
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Anyone running this?
I am all about .223 based AR calibers. I ran the ballistics per the SSK website and found 107 grain bullet at 2750 retains 1062 foot pounds of energy at 300 yards with 22 inches of drop. 1519 foot pounds at a 100 yards might hurt a little! Please discuss. |
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Quoted:
Anyone running this? I am all about .223 based AR calibers. I ran the ballistics per the SSK website and found 107 grain bullet at 2750 retains 1062 foot pounds of energy at 300 yards with 22 inches of drop. 1519 foot pounds at a 100 yards might hurt a little! Please discuss. I have one, but alas the SSK numbers on the website are way off real world chronographed numbers (does not come close to those numbers posted on website w/o going way over pressure [~78K PSI]). While accuracy is quite good, the external ballistics don't come close to load data that came with the upper from SSK, and IMHO are dangerously over pressured according to all my Internal ballistic computer programs I have available... That eventually lead me to develop the .223/5.56mm based 6.5mm PCC round that has been tested in the field with real world chronographed results by many end users on this forum and others... Good Luck. |
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Quoted:
Anyone running this? I am all about .223 based AR calibers. I ran the ballistics per the SSK website and found 107 grain bullet at 2750 retains 1062 foot pounds of energy at 300 yards with 22 inches of drop. 1519 foot pounds at a 100 yards might hurt a little! Please discuss. I just looked through the 6.5 Grendel Reloading Handbook between AA's and Hodgdon's data on the 107gr SMK from a 24" barrel, and 2730fps is the fastest with max loads on 2 of the powders. No way is the .223 case going to top that with 5-7grs less powder. |
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Quoted:
I just looked through the 6.5 Grendel Reloading Handbook between AA's and Hodgdon's data on the 107gr SMK from a 24" barrel, and 2730fps is the fastest with max loads on 2 of the powders. No way is the .223 case going to top that with 5-7grs less powder. Quoted:
Quoted:
Anyone running this? I am all about .223 based AR calibers. I ran the ballistics per the SSK website and found 107 grain bullet at 2750 retains 1062 foot pounds of energy at 300 yards with 22 inches of drop. 1519 foot pounds at a 100 yards might hurt a little! Please discuss. I just looked through the 6.5 Grendel Reloading Handbook between AA's and Hodgdon's data on the 107gr SMK from a 24" barrel, and 2730fps is the fastest with max loads on 2 of the powders. No way is the .223 case going to top that with 5-7grs less powder. Well you see what I mean ( I was looking at some of the same load data)...If the Grendel needs 35gr. case capacity w/ a 24" Bbl. running at ~52K PSI chamber pressures...there is no way it can be done w/o extreme pressures and at max. of 26-27 gr. case capacity of the MPC, etc. |
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