The other consideration is that the 340 weight probably around 10 or 11 pounds, whilst the 300 weight around 8. I am a young guy, I am sure I can haul it around, but my shoulder may not thank me for it
Now, don't be announcing to gunner you can't pack a 10# gun, he'll think you're a big wuss...
You got "young" on him, for sure, but he's a Hoss...
Maybe a senior Hoss...
But a Hoss is still a Hoss...
DF