Not so Long Knife: muskets were meant to be aimed. This myth comes from the fact that the English did not use the phrase "take aim," but the term "present" implied aim rather than simply leveling your musket in the general direction of your foe.
“..raise up the Butt so high upon the right Shoulder, that you may not be obliged to stoop too much with the Head, the right Cheek to be close to the Butt, and the left Eye shut, and look along the Barrel with the right Eye from the Breech Pin to the Muzzel…."
"The Regiments are frequently practiced at firing ball at marks. Six rounds pr man at each time is usually allotted for this practice. As our Regiment is quartered on a Wharf which Projects into the harbour, and there is very considerable range without any obstruction, we have fixed figures of men as large as life, made of thin boards, on small stages, which are anchored at a proper distance from the end of the Wharf, at which the men fire. Objects afloat, which move up and down with the tide, are frequently pointed out for them to fire at, and Premiums are sometimes given for the best shots, by which means some of our men have become excellent marksmen."
"I saw a Regiment & the Body of marines, each by itself, firing at marks. A Target being set up before each company, the soldier of the regiment stept out singly, took aim & fired, & the firing was kept up in this manner by the whole regiment till they had all fired ten rounds. The Marines fired by Platoons, by Companies, & sometimes by files, & made some general discharges, taking aim all the while at Targets the same as the Regiment.
Lookt at five companies on the common firing at Targets. A little dog happened to be on the beach where the balls fell thickest, & continued to run backwards & forwards after the balls, being much diverted with the noise they made, & the dirt flying about; & kept doing so, till they had done firing their 10 rounds apiece without being hurt."
Check this article out for more context for those 18th century quotes.:
http://allthingsliberty.com/2013/08/the-aim-of-british-soldiers/