Frulk
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- Nov 26, 2018
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Thursday PM I sat in the reloading room and put together some .327 FM 120 gr., .314 dia LRNFP Powder Coated rounds using #9 and CCI SRP's. I had Friday off from work and the range is open due to summer hours so I planned to head out and chrony the loads for baseline FPS data.
This was the second effort using #9 powder. Last time I put together quite a few 120gr Alox lubed LRNFPGC versions of the powder coated ones. I had just received the PC versions and only had time to put a few together before heading to the range.
Brian Pearce in the Feb 2015 issue of Handloader employed a 7.5 inch Single Seven and ran a 130 grain Rim Rock SWC Keith (.312/.313 dia) using 10.7 grains of #9 up to 1,424 FPS. He utilized CCI 500 primers and Federal brass in that endeavor.
At my last .327 Fed Mag Range outing (this past Sunday) I was using a 4 inch GP100 and pushed the Alox gas checked 120's to a 1,288 FPS average using 9.5 grains of #9. No sticking of cases and primers looked like the AE factory loaded 100grain JSP primers after firing.
That was 1.2 grains of powder and 3.5 inches of barrel length short of what Pierce used to motivate a 10 grain heavier bullet. Knowing that, I was comfortable pushing ahead with some hotter loads for this session. I did keep in mind that my loads were not EXACT duplicates of his as I had introduced a number of variables. Specifically SRP's, increased bullet diameter and mixed brass).
At the Range yesterday:
I'm not posting powder weights as I was beyond published load data.
With the 120 grain LRNFPPC I was able to achieve a 1,485 FPS average for 7 shots with my max charge of #9. I had a couple of cases with mild sticking in the cylinder and a bit of increased primer flattening. At this point I stopped as I was at the max powder charge I had available for the range session. I might sometime this winter go back and load up some different primers (non small rifle) and only use factory new Starline brass and see what the results of that show. However, I will not increase the powder charge as I'm at the max I'm comfortable with.
Edited to add: at the max charge I was very close to starting to compress the powder stack.
After retiring the Single Seven into the range box I pulled out the Henry Rifle (20 inch) and proceeded to clock a few Hornady XTP 100 grainers using CCI 500 primers over 2400 for some baseline data as I had never shot them from the rifle before.
During a previous outing in an SP101 with 3.2 inch barrel this combo produced an average of 1,465 FPS.
In the Henry a six shot string produced a 1,929 FPS average. No case sticking. In fact they more or less just fell out with almost no effort to cycle the lever. Primer flattening was again about what I see from the factory AE 100grain JSP round. I was unable to determine accuracy as the wind blew my target off the cardboard backing just after the range had shooters reset all targets. At the future shooting session mentioned above I may see if it's possible to hit that 2,000 FPS mark safely.
Once home I ran the Lewis Lead Remover through the Single Seven. Zero leading. I was pretty happy with that result knowing leading won't be a concern since I'll probably back off the max charge I used today after I see where the most accuracy is to be found with a specific powder weight.
This was the second effort using #9 powder. Last time I put together quite a few 120gr Alox lubed LRNFPGC versions of the powder coated ones. I had just received the PC versions and only had time to put a few together before heading to the range.
Brian Pearce in the Feb 2015 issue of Handloader employed a 7.5 inch Single Seven and ran a 130 grain Rim Rock SWC Keith (.312/.313 dia) using 10.7 grains of #9 up to 1,424 FPS. He utilized CCI 500 primers and Federal brass in that endeavor.
At my last .327 Fed Mag Range outing (this past Sunday) I was using a 4 inch GP100 and pushed the Alox gas checked 120's to a 1,288 FPS average using 9.5 grains of #9. No sticking of cases and primers looked like the AE factory loaded 100grain JSP primers after firing.
That was 1.2 grains of powder and 3.5 inches of barrel length short of what Pierce used to motivate a 10 grain heavier bullet. Knowing that, I was comfortable pushing ahead with some hotter loads for this session. I did keep in mind that my loads were not EXACT duplicates of his as I had introduced a number of variables. Specifically SRP's, increased bullet diameter and mixed brass).
At the Range yesterday:
I'm not posting powder weights as I was beyond published load data.
With the 120 grain LRNFPPC I was able to achieve a 1,485 FPS average for 7 shots with my max charge of #9. I had a couple of cases with mild sticking in the cylinder and a bit of increased primer flattening. At this point I stopped as I was at the max powder charge I had available for the range session. I might sometime this winter go back and load up some different primers (non small rifle) and only use factory new Starline brass and see what the results of that show. However, I will not increase the powder charge as I'm at the max I'm comfortable with.
Edited to add: at the max charge I was very close to starting to compress the powder stack.
After retiring the Single Seven into the range box I pulled out the Henry Rifle (20 inch) and proceeded to clock a few Hornady XTP 100 grainers using CCI 500 primers over 2400 for some baseline data as I had never shot them from the rifle before.
During a previous outing in an SP101 with 3.2 inch barrel this combo produced an average of 1,465 FPS.
In the Henry a six shot string produced a 1,929 FPS average. No case sticking. In fact they more or less just fell out with almost no effort to cycle the lever. Primer flattening was again about what I see from the factory AE 100grain JSP round. I was unable to determine accuracy as the wind blew my target off the cardboard backing just after the range had shooters reset all targets. At the future shooting session mentioned above I may see if it's possible to hit that 2,000 FPS mark safely.
Once home I ran the Lewis Lead Remover through the Single Seven. Zero leading. I was pretty happy with that result knowing leading won't be a concern since I'll probably back off the max charge I used today after I see where the most accuracy is to be found with a specific powder weight.
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