You boys are alright! I don't care what Roy say about you!
I guess we will have to talk to Roy! gun)
I guess this only leaves me with one more item to compare this with FFS. So far everything is the same.
You'd be surprised how different both programs are. LB3.0 engine is impressive even when the bullet goes subsonic!
FFS does not have the additional modules in the software a least that I saw. It does put everything on one plate for you as well though.
In FFS there is an item they call "DK" best I can figure is it's their method for confirming BC.
Their "DK" is kind of similar to LB's "DC" (Drag Coefficient), but their values are not interchangeable.
I would consider it similar to the "trajectory validation" in Exbal (except Exbal changes your MV when you do this and does nothing for correcting BC for windage by using this function). However in FFS you must shoot a group at a distance where your bullet speed is 1200-1400 fps. My wimpy 270 doesn't hit that mark till about 1100 yards, let alone a longer reaching cal.
A lot of good folks would be offended if truth be said about some methods for calculating drops, BC's etc.
Does LoadBase have some method for validating trajectory?
LB3.0 "DC" is more powerful than most folks realize. You use a chronograph, 4 different distances like (0,100,200,300); four velocities and LB will calculate for you a G1 BC and a DC (Drag Coefficient) that by working together has impressed many folks with its foretelling ability of where that bullet will be at different ranges even, as mentioned before, after the bullet goes subsonic.
LB also incorporates, for quite a while now, a "Zero Finder"; if you know the distance and the bullet impact, LB will tell you the distance for your zero range. Example: you shoot your rifle at 427 yards, and your POI is 6" low, run the program and will tell you something like "True Zero Range" xxx yards.
Does LoadBase have it's own way of calculating spin drift (like by using twist rate and barrel length) or is it to be measured like with exbal?
Look at the second screen shot on page one, the one that asks for bullet length, that's what LB uses to calculate the SF, yellow highlighted number, then it uses that number to calculate the spin drift. That's it!