You can't get CCW in MD, but can get out-of-state papers for PA.
Actually, this is not true. PA requires that you have a license or permit from your home state IF your home state issues a permit. Since MD does ... in theory ... offer a permit (though not in practice) you would have to have to possess one in order to obtain the PA LCTF. I have heard of instances where this was overlooked, but wouldn't count on it.
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FWIW, I live in PA and commute to MD every day -- 40 min. each way.
(To compare, this is after a 4 year stint living in MD. In MD, I commuted about 25 miles most days. I never made it in less than 1.5 hours. Now I commute about 40 miles each way and it takes me about 40 min. No traffic, just cows, farms, and beautiful countryside.)
The idea that I'd live in MD again because it is closer to work is UTTERLY LAUGHABLE. To say that life up here is more favorable -- in
EVERY SINGLE WAY -- is a gross understatement.
Great CCW laws, very favorable "gun culture," 100s ... no, 1000s ... of local gun clubs and ranges with such varying characters and facilities that you can find something that fits your style perfectly, and quite a few (non-gun-related) other compelling attributes.
When I lived in MD, my gun club's fees were $500. Here in PA, my club's dues are $55 a year for a great club that's far more active and much more aligned with my interests.
I shoot a lot of IDPA competitions. I get an email that lists somewhere between 10 and 15 matches within driving distance EVERY WEEKEND. And that's just in one competition discipline! There are just WAY more matches, events, gun shows, gun shops, ranges, and other interesting opportunities available here to take advantage of 10% of it all.