Maybe the '95 in .405 WCF was made famous by T. Roosevelt, but the most popular caliber was .30 US, or .30-40 as it is better known. Another contender was the .35 WCF, a big game caliber par excellence. Interestingly, the Russian Government contract of nearly 300,000 muskets in 7.62mm made that caliber the production champ, and it wasn't even for use on this continent. Many did return, though, and were sold for pennies by various arms companies. :-)