JonB_in_Glencoe
09-25-2014, 04:15 PM
well, I finally got to the range with some HV loads for my 243win in my "off the shelf" Mod 70.
arg !!!!
first I forgot my chrony tripod and my camera.
but it didn't matter as I didn't have very good success.
I had lubed these with SL-68, which I learned I burnt the soap with improper temperature control during the end of that blending process. I also had an issue with seating the GC's...see photo.
http://i640.photobucket.com/albums/uu127/JonB_in_Glencoe/243boolits_zps587f6953.jpg (http://s640.photobucket.com/user/JonB_in_Glencoe/media/243boolits_zps587f6953.jpg.html)
So anyway, I have a few things to improve with the next batch of ammo. I plan on making another batch of Lube (and NOT burn the soap), and also to seat the checks in a different manner to eliminate the imperfections in the bases...which means another batch of heat treating and more waiting.
btw, these boolits ended up at 27BHN,,,maybe to hard ? I'm not sure if I'll change that factor next time or not ?
So anyway, here is the synopsis of results:
Batch one,
IMR4064 36.7gr
per book, they should be going 3200fps (50Kpsi)
I got 5"groups (10 shots) at 100 yds
Batch two,
IMR4064 38.2gr
per book they should be going about 3300fps (53Kpsi)
I got about 12" groups (10 shots) at 100 yards
one group was like I was circleing the bull like the numbers on a clock...none near the bull, all were about equa-distant from the bull.
Batch three,
was a low velosity batch for a 'check' and also for cleaning the bore if I got some fouling, which I did, all in the chamber end of the barrel and on the bottom???
WC844 (mil surp H335), 19.8gr 2000fps (20Kpsi)
2" groups (10 shots).
edited: I forgot to mention, Batch three low velosity ammo had boolits that were NOT heat treated, they were air-cooled 94-3-3 with BHN 12.5 and these were lubed with MML+S
I wish I had my chrono tripod,so I could have verified the speed and see the SD as I didn't individually weigh the charges...I used the Lee pro disk and double checking and triple checking the first few loads, I was within ± 1.0 gr. I figured that was good enough for the initial testing of the load.
arg !!!!
first I forgot my chrony tripod and my camera.
but it didn't matter as I didn't have very good success.
I had lubed these with SL-68, which I learned I burnt the soap with improper temperature control during the end of that blending process. I also had an issue with seating the GC's...see photo.
http://i640.photobucket.com/albums/uu127/JonB_in_Glencoe/243boolits_zps587f6953.jpg (http://s640.photobucket.com/user/JonB_in_Glencoe/media/243boolits_zps587f6953.jpg.html)
So anyway, I have a few things to improve with the next batch of ammo. I plan on making another batch of Lube (and NOT burn the soap), and also to seat the checks in a different manner to eliminate the imperfections in the bases...which means another batch of heat treating and more waiting.
btw, these boolits ended up at 27BHN,,,maybe to hard ? I'm not sure if I'll change that factor next time or not ?
So anyway, here is the synopsis of results:
Batch one,
IMR4064 36.7gr
per book, they should be going 3200fps (50Kpsi)
I got 5"groups (10 shots) at 100 yds
Batch two,
IMR4064 38.2gr
per book they should be going about 3300fps (53Kpsi)
I got about 12" groups (10 shots) at 100 yards
one group was like I was circleing the bull like the numbers on a clock...none near the bull, all were about equa-distant from the bull.
Batch three,
was a low velosity batch for a 'check' and also for cleaning the bore if I got some fouling, which I did, all in the chamber end of the barrel and on the bottom???
WC844 (mil surp H335), 19.8gr 2000fps (20Kpsi)
2" groups (10 shots).
edited: I forgot to mention, Batch three low velosity ammo had boolits that were NOT heat treated, they were air-cooled 94-3-3 with BHN 12.5 and these were lubed with MML+S
I wish I had my chrono tripod,so I could have verified the speed and see the SD as I didn't individually weigh the charges...I used the Lee pro disk and double checking and triple checking the first few loads, I was within ± 1.0 gr. I figured that was good enough for the initial testing of the load.