I want to buy a .243 bull barrel for my .223 bull barrel Survivor.After the initial mail in of the receiver&stock for the new .243 barrell fitting,the mfg then sends it all back to me. Everytime I want to change out my .223 to the .243 or back again, I won't have to remail it all out again to the mfg,will I? I wouldn't think so; instead, that I would be able to just switch them out @ home and that it would be a simple procedure?

If I understand your question correctly, the answer is "yes" you will be able to change barrels yourself. The factory "fits" the barrels to your reciever. It only need be done once.
Cheezywan

All you have to do after a barrel is fitted at the factory is unscrew the forearm screw, take the forearm off and break open the action. The barrel lifts out and the other barrel fits in its place. Factory fitting is adjusting the headspace and etc. to fit that receiver and forearm.

I want to buy a .243 bull barrel for my .223 bull barrel Survivor.After the initial mail in of the receiver&stock for the new .243 barrell fitting,the mfg then sends it all back to me. Everytime I want to change out my .223 to the .243 or back again, I won't have to remail it all out again to the mfg,will I? I wouldn't think so; instead, that I would be able to just switch them out @ home and that it would be a simple procedure?

The barrel accessory program is a real good deal in my opinion. When you fill out your form you can also write in "Trigger Job" and "No Charge" in the column for cost (if you want them to do a trigger job @ 3.5 pound pull). I am planning to get do this with mine when I send it off for a .44 mag barrel and their shortest 20 gauge barrel to add to my .243. Remember - don't write "gun" or "firearm" on the package or you will get hassled.
After you get the new barrel and your original stock & receiver all you need is a phillips screw driver to make the swap from then on.

http://www.hr1871.com/barrelAcc/index.htm

Happy Shootin'
C

The barrel accessory program is a real good deal in my opinion. When you fill out your form you can also write in "Trigger Job" and "No Charge" in the column for cost (if you want them to do a trigger job @ 3.5 pound pull). I am planning to get do this with mine when I send it off for a .44 mag barrel and their shortest 20 gauge barrel to add to my .243. Remember - don't write "gun" or "firearm" on the package or you will get hassled.
After you get the new barrel and your original stock & receiver all you need is a phillips screw driver to make the swap from then on.

http://www.hr1871.com/barrelAcc/index.htm

Happy Shootin'
C

Would you recommend maiing it all (less the original barrel) in the original box(new gun box) ,or packaging it up in a less obvious container,keepng in mind that H&R will be mailing me back an entire gun,with a new barrel?Will H&& return the parts to include the new barrell in THEIR box or in mine?Who will the potential hassle come from?The shipper since its gun parts?

Would you recommend maiing it all (less the original barrel) in the original box(new gun box) ,or packaging it up in a less obvious container,keepng in mind that H&R will be mailing me back an entire gun,with a new barrel?Will H&& return the parts to include the new barrell in THEIR box or in mine?Who will the potential hassle come from?The shipper since its gun parts?

I don't think I would use the original box myself, I would just follow H&Rs instructions to avoid any possible delays in shipping the gun parts to them:
"Carefully package the stock, forend and frame (receiver) for shipping. (DO NOT SHIP YOUR EXISTING BARREL.) Send by U.S. Mail or U.P.S. insured to the following address (DO NOT MARK CONTENTS ON THE OUTSIDE OF SHIPPING CARTON):"
They will ship it back in their packaging upon completion.

Then the fun of breaking in a new barrel and working up handloads begins!
c

Uncle Jerky,

I've sent many frames w/stocks in for barrels, I have used USPS and UPS, have never been hassled by either. I've also sent in just the frame and had them install a new stock set along with fitting new barrels. They will fit barrels to a frame without a stock set even though they say to send the stock. Several members at GBO have done this, the main reason being H&R can damage the stock, I've had a BC stock returned broken, the toe was broke off before they shipped it. They did replace the stock, however. Some members quit sending stocks or send a cheap pallet wood or syn stock that doesn't matter if they scratch it up. That's your call. They will return the rifle by UPS, adult signature required, in one of their double boxes, a retail box within an outer box. One inexpensive way to send it is to remove the butt stock from the frame and send the stock set and frame in a USPS Priority Flat rate box, cost is $8,10 plus $3.35 insurance. If you want to ship by UPS, you must go to a Customer Center, the UPS stores won't accept firearms which you must declare when you insure it.

https://www.ups.com/content/us/en/resources/prepare/guidelines/firearms.html

Tim