Hi
I have a 6.5PRC with a Krieger 1:8 Twist barrel 26". I shoot 147 ELD-M (batch 2180670). I am running them just over 3000 ft/s and shoot 1/2MOA all day long.
In winter, I calibrated the BC out to 1350m and it came in at 0.345; i.e. pretty close to the published value.
What I noticed when I calibrated the next time around 20 degree Celsius( 68 degrees Fahrenheit), that the BC came in at 0.335. I went to shoot a competition and noticed that as the day warmed up, I was undershooting all the gongs from 900m onwards. I blamed myself.
Last Friday I calibrated at around 30 dC (86 d F) and noticed that I could not see some impacts (I was alone, but I now know that they broke up), but the BC calibrated to 0.31.
The competition on Saturday started out at around 20 dC (68 dF) and went up to 33 dC (92dF). It was a very calm day so wind was not an issue. However, I overshot the long gongs initially and later undershoot them. The point of impacts were very consistent on each stage.
I had two bullets break up halfway (confirmed by a few spotters). Never happened before to me.
Today, I went back to my calculator and played around with the BC to check what the settings would have been at the respective distances during the match. If I started the day on 0.35 and ended on 0.295 it would have been an amazing day.... It seems like the BC is going down as the temperature is going up. I can only explain that by the tips starting to melt like on the Amax bullets.
1. Does Hornday still have an issue with the ELD-M breaking up?
2. Do the ELD-M tips still melt? I thought they fixed it with the new tips? Anybody experience the same?
3. Could it be the jacket starting to deform, but not breaking up and thus decreasing the BC? Personally I would think that this would cause flyers, which I did not have.
Thanks
Dirk
I have a 6.5PRC with a Krieger 1:8 Twist barrel 26". I shoot 147 ELD-M (batch 2180670). I am running them just over 3000 ft/s and shoot 1/2MOA all day long.
In winter, I calibrated the BC out to 1350m and it came in at 0.345; i.e. pretty close to the published value.
What I noticed when I calibrated the next time around 20 degree Celsius( 68 degrees Fahrenheit), that the BC came in at 0.335. I went to shoot a competition and noticed that as the day warmed up, I was undershooting all the gongs from 900m onwards. I blamed myself.
Last Friday I calibrated at around 30 dC (86 d F) and noticed that I could not see some impacts (I was alone, but I now know that they broke up), but the BC calibrated to 0.31.
The competition on Saturday started out at around 20 dC (68 dF) and went up to 33 dC (92dF). It was a very calm day so wind was not an issue. However, I overshot the long gongs initially and later undershoot them. The point of impacts were very consistent on each stage.
I had two bullets break up halfway (confirmed by a few spotters). Never happened before to me.
Today, I went back to my calculator and played around with the BC to check what the settings would have been at the respective distances during the match. If I started the day on 0.35 and ended on 0.295 it would have been an amazing day.... It seems like the BC is going down as the temperature is going up. I can only explain that by the tips starting to melt like on the Amax bullets.
1. Does Hornday still have an issue with the ELD-M breaking up?
2. Do the ELD-M tips still melt? I thought they fixed it with the new tips? Anybody experience the same?
3. Could it be the jacket starting to deform, but not breaking up and thus decreasing the BC? Personally I would think that this would cause flyers, which I did not have.
Thanks
Dirk
