Re: Online seminar on Field Firing Solutions
I agree, tuning begins with the velocity and BC. There may come a point in the tuning process that the change in BC required to match the real world far end trajectory starts to skew the near / middle range elevation values by an excessive amount. At that point, a modification of the DK appears to produce the desired effect on the long range end of the values without altering the mid range by a signifigant amount. For example, my 250 Lapua Scenar data correlates to radar data near perfect with a DK of .499, and real world testing gives me confidence that the solution is more accurate than I can hold.
None of my .30 cal or 6.5 cal systems have required a correction of the DK. The most I've used is a DK of .485 for the Mk211.
I think too many people give way too much weight to how the program does the calculation. From what I've been able to do in testing, all of the available programs will give a solution that is quite usable, provided the groundwork is done to calibrate the system to the real world results.
Selection of a progrm should be based on the desired feature set, what can the program do to make the job easier, faster, more reliable? How simple is it to get the system setup and creating that accurate solution?
At Gunsite, we've settled on FFS Delta IV / V as the most feature rich, easy to configure system, giving highly accurate solutions using the tools and methods provided.
If you don't need LRF and GPS integration, map ranging and target coordinate generation, instant elevation reticle holds from any zero range, tools for path metrics like danger space and PBZ, range cards, etc., then a simple program like Ballistic might be all you need.