Rich Lucibella was correct. It is all been said before.
Closing The Firing Line was difficult for a lot of us , still Rich was correct in closing it for a time, and was correct when he said it had all been said before.
RV's and other similar structures such as Canteens (portable food vending) and Manufactured homes, are not of a construction one can really beef up.
Not in the sense a apt, condo , home, or business is.
Most Mfg'd homes only have a 7' ceiling, RV's "might" have 7' in some places where as Standard for homes is 8'
You do not have the headroom, to manipulate a firearm, , no "attic" in which to store items either for storage, or backstop to stop projectiles.
Even .22 rim-fire will go through /has been known to go through a drywall ceiling, through the attic and exit a roof with roofing shingles in a House.
Noise.
Being as RVs and Canteens, and Mfg homes ( house trailers, mobile homes) are more confined, Low Pressure rounds are suggested to protect your hearing and those in these structures with you.
.38spl and .44 spls are low pressure rounds.
What the Original Post is essentially asking :
What Gun for Vehicle?
Sorry, and no disrespect intended, but I am damn good at this.
Yes, the 45ACP is a low pressure round...
That said-
In a tight, confined area, such as a RV /Vehicle, there are steering wheels, consoles, seats, and other things, if a situation occurs, you do not want to take a chance on a Semi:
- going out of battery pushing up against a criminals body.
- having mag release get hit in grappling for a gun.
- slide in recoil getting caught on steering wheel, seat, ...anything.
You do want:
-a Low pressure round
-Less Muzzle flash
-Less Noise
- Reliable, meaning a revolver shoved against a criminal's gut, is not going out of battery.
- If bad luck shows with a bad primer, pull the trigger again.
etc.
Since I have spent time in Armored cars, Armored vans, and assisted with these folks and training, the dedicated .38spl revolver with standard pressure 158 gr loads, is a very very good choice for Armored car guards.
I have also spent time in a RV , and Vans such as Plumber's and other workers use, with Body Guards, Cops, and other situations doing surveillance and other work.
I have also been the guy serving you a hot dog from a Canteen as cover for watching my folks do what they do, and being a lookout.
I have assisted Cops in this too.
What I and others have sahred time and time again is "Forget the damn gun" being the answer to every situation.
The gun is the easiest tool in the tool box, get a dedicated .38spl revolver, Medium Frame, and use standard pressure 158 gr loads .
This "tool" takes care of 90% + of all gun needs most folks have.
OP in this case needs to take a Personal Protections Class, Defensive Driving and Assertive Driving Class.
I would also recommend a RV class.
What I would do, being dead serious, is Investigate & Verify, by speaking with a Cop for instance that has done Protection Detail, and has traveled in a RV being retired.
Get with folks that have actually done those things with Mindset, and Skill sets to share with you how to stay safe.
Go visit with Taxi driver, or the young cute gal that drives a Limo, they have a wealth of information about traveling in vehicles.
Find someone that is a on the road sales rep, or retired from being one, and find out from them, about security measures.
Hey, I have only racked up 60k miles in one year, some years doing this work, what do I know?
Go speak to Sales Rep in various industries, and if you are lucky, you might find some I assisted in training.
An RV is nothing more a bigger Lincoln, Cadillac, Chrysler, Buick, Mercedes, Ford or Chevy , that allows one to cook, sleep work , and watch TV in.
So one incorporates S&T from both Vehicle and Home Security concerns.
Trust me, just get dedicated medium frame revolver in .38spl and load it with standard pressure 158 grain.
I recommend Colt Detective Special, Ruger SP101 with both snub nose and 3" barrel, and Model 10/64 Smiths with snub nose and 3" barrels.
Then again what do I know, I only had Mentors that traveled for a living before I was born, and when I was born and as I grew up, and some towed those little "tea cup" trailers.
Trust me, Colt Detective Special, S&W J and K frames were the guns carried for sure with them.
As were 1911s, BHPs, Colt Woodsman, Beretta Jetfire, Bobcat, Minx.
Model 12 and Ithaca 37 shotguns for repeaters in both 12 and 20 and Single shot 20 ga.
Lever Action 30-30, .30 cal carbine, were some of the rifles.
I know, I was that brat being mentored to with all this.
I am done with this one.
It has all been said before...