Some more .45 loads..............
Jun 9, 2009 19:57:15 GMT -5
Post by Richard on Jun 9, 2009 19:57:15 GMT -5
Weather today at our range here in Hickory NC was in the low 80's with not much wind, but fairly humid. Herman is still patiently awaiting his .45 Pac-Nor barrel and subsequently has neglected his .50 ML. After seeing the results the .45 is capable of, (I think ) he feels he would be just wasting powder and bullets shooting the .50. Not that the .50 does not shoot, but he is definitely looking forward to better accuracy.
Please understand that when I put results from my range sessions on the forum, it is done so people interested might gain some information from my expenditure on powder and bullets. Otherwise known as sharing.
The scope on my Savage Pac-Nor is a Burris Short Mag with the ballistic plex, AO, 4.5x14 set at 14X. Cooling rod and cleaning as I had outlined in the "To clean or Not to clean" thread.
First off this morning I tried the 260 gr. Scorpions along with 56 gr. of N-120 powder - sabot less. The load put two together and then shot the third shot straight up. Note velocities???
They may work with a different load
The second load is where it gets interesting. As you can see, five shots at 100 yards produced a nice round group measuring 1.274". Also note the fairly consistent high velocity I was getting with a 30 fps ES. Now go to group #3 which was shot with the exact load immediately following #2. Note the velocities and the placement of the bullets on the 300 yd. target. (I had made a windage adjustment on the scope and was using the third ballistic-plex dot for aiming) Shots 2 and 3 were of considerably lower velocity and subsequently impacted low. Shots 1, 4 and 5 of higher velocity formed a fairly decent group.
It is scenarios like this where shooting with a chronograph is the only way you know (or at least have a clue) what caused "flyers" or "vertical!" I cannot tell for sure that those two shots loaded "easier or different?" But the lower velocity definitely cause a change in POI.
Look at group #4 at 300 yards. Different duplex, lower velocity by around 200 fps, same weight bullet but saboted. Velocities pretty equal (35 fps ES)..............No big vertical spread!
Group #5 at 300 yards??? I forgot to turn the chronograph on for the first shot, so I cannot explain the higher hit. With this load I also used the "post" below the third dot for aiming....and it still shot low.
Once you start reaching out beyond 200 yards, vertical gets critical with relatively small changes in MV.
I truly believe that if I had shot group #3 at 100 yards, it would have formed a nice small group just like #2. Those changes in velocity would not have been as apparent as at 300.
Let me also say that using the cool rod allows me to shoot without that waiting! I move from shot to shot and group to group without any major breaks. I cool whether saboted or sabotless.
Richard
Please understand that when I put results from my range sessions on the forum, it is done so people interested might gain some information from my expenditure on powder and bullets. Otherwise known as sharing.
The scope on my Savage Pac-Nor is a Burris Short Mag with the ballistic plex, AO, 4.5x14 set at 14X. Cooling rod and cleaning as I had outlined in the "To clean or Not to clean" thread.
First off this morning I tried the 260 gr. Scorpions along with 56 gr. of N-120 powder - sabot less. The load put two together and then shot the third shot straight up. Note velocities???
They may work with a different load
The second load is where it gets interesting. As you can see, five shots at 100 yards produced a nice round group measuring 1.274". Also note the fairly consistent high velocity I was getting with a 30 fps ES. Now go to group #3 which was shot with the exact load immediately following #2. Note the velocities and the placement of the bullets on the 300 yd. target. (I had made a windage adjustment on the scope and was using the third ballistic-plex dot for aiming) Shots 2 and 3 were of considerably lower velocity and subsequently impacted low. Shots 1, 4 and 5 of higher velocity formed a fairly decent group.
It is scenarios like this where shooting with a chronograph is the only way you know (or at least have a clue) what caused "flyers" or "vertical!" I cannot tell for sure that those two shots loaded "easier or different?" But the lower velocity definitely cause a change in POI.
Look at group #4 at 300 yards. Different duplex, lower velocity by around 200 fps, same weight bullet but saboted. Velocities pretty equal (35 fps ES)..............No big vertical spread!
Group #5 at 300 yards??? I forgot to turn the chronograph on for the first shot, so I cannot explain the higher hit. With this load I also used the "post" below the third dot for aiming....and it still shot low.
Once you start reaching out beyond 200 yards, vertical gets critical with relatively small changes in MV.
I truly believe that if I had shot group #3 at 100 yards, it would have formed a nice small group just like #2. Those changes in velocity would not have been as apparent as at 300.
Let me also say that using the cool rod allows me to shoot without that waiting! I move from shot to shot and group to group without any major breaks. I cool whether saboted or sabotless.
Richard