We have been known to do this from time to time. It does work. Remember one time at Te Iringa a guy had a plug of crap jammed in his barrel and then he broke a stick off trying to clear it. We pulled a 30 06 round ( one of his ) and tipped a little out and chambered the shell carefully so as not to spill the remaining powder and fired it, but to no avail it wouldn't go off. We then pulled a 243 round and same thing but when fired it did go off and cleared the obstruction nicely. The important thing here is that the projectile is pulled and it's only the powder gases pushing the obstruction out. Have used this method about four or five times and has always worked well. It may not be a real safe practice but I don't like ramming rods, sticks, wire etc down a rifle barrel, that's real hard on the barrel.
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