I'm reading Tom Clancy's non-fiction book "Shadow Warriors". In one section his co-author, Carl Stiner, a retired general, is recounting his Ranger training. They are slogging around in the mountains of north Georgia on a training exercise culminating in a mock attack on a dam. He comments that they usually put out a large volume of fire in that situation, but in this instance only 10 rounds or less were fired. He states on page 122:
"...we had been using our weapons as pikes in order to climb the steep, ice-frozen slopes, and the end of most of our rifle barrels had been too plugged with ice to fire."
Would a someone in Ranger training really use their rifle like a sharp stick and poke the barrel into the ground to help them climb a hill, especially in anticipation of firing the same rifle at any moment?
And how could having the end of the barrel plugged prevent the primer from igniting the powder in the round? I imagine they were training with blanks, but I still don't get it.
I'm not sure if Clancy is a fan-boy wowed by the tall tales of an operator without the experience he claims or I'm missing something here. Anybody able to help me understand this? Thanks!