It's hard to think about shooting long range without higher math, ranger finders either laser or optical, dedicated sniper rifles or calibers. To be fair we now think of long range as 1,000+ meters. But consider WWII snipers who used 03A3 to such great effect. It was up to the shooter to figure it out in his head or off a predetermined chart then adjust on the fly using what was a regular rifle with a simple scope added to it. Those guys were amazing to me.