Originally Posted By: sscoyoteSomeone already mentioned the true click value, but u may also want to consider the drag function used to calculate the BC of that VLD bullet. Most ballistics programs use a G1 drag function, but some such as JBM can use different drag functions that more closely match the bullet types (VLD to VLD such as you have there). Check it on JBM and adjust the drag function for G7 and see what the velocity and drops come out.
Tom--u need to go to JBM and study those systems. It is a great resource for LR shooting and making (the most) accurate calcs. I couldn't null out the trjectory for my AR using a 65 JLK Low Drag for love or money and finally started adjusting the drag function until my data matched as closely as possible and i finally had it then.
I am sure you are right about that. I often question the BC that a manufacturer gives for their bullet. And we know that changes with different velocities of the same bullet. I did not think about slightly adjusting the BC in the ballistics calculator I was using. I will give that a try, and see if I can get a bit closer.
However most of what I have been able to find out has been for a velocity of 3400 fps with the 75 -Max. And I thought that velocity was unobtainable by the standard 22-250. But I have had a few comments from some guys who say they are actually getting as much as 3450 in the 22-250 with the 75 A-Max and H-414.
The way I figured 3400 fps was trial and error of all the variables that are "known" in this scenario. Kind of a fun thing to toy around with. I didn't mean to ruffle any feathers. I guess a few guys don't want to join in on the conversation. They just want to ridicule my motives?? Not sure why?? But it is a free country.
As far as selling the rifle. I was going to. But I did not get the price I felt it was worth. So I have decided to hunt with the rifle. Even if it is a bit heavier than what I prefer. I can deal with the weight. Especially since my Kawasaki Kule will be doing all the carrying. Thanks to the guys who spent a little time trying to help. I am going to try and get out to hunt a few times this year, and the hay is down in one of my favorite spots. And shots to 600 in these meadows is regular shooting. And my 22-250 is sighted in well to 500 and looking good to 600, so she is ready to hunt. I just wanted to have a little better understaning of the 100 to 200 yard shots, and thus the question. Heck we all know it is going to be in the 3" area at 100 yards from our past experience without shooting the first shot or making the first calculation. I just thought it might be fun to work it backwards. Sorry if it offended anyone. I am going to turn her loose!! Thanks, Tom.
