Can a regular 22 rifle shoot 22 magnum bullets?

This site is not a gun site as far as value estimates goes we have no clue. Contact a local gun shop or gunsmith (best choice) and they may be able to help.

no
there is a small lip that pulls the shell out of the breach as the bolt moves back
take it in to a firearm repair shop and have it properly fixed

You will need to shoot over a chronograph to get the muzzle velocity for you weapon with the ammo you want then you can input the info into a free ballistics programming like chairgun from the telescopic sight company Hawke and print of drop sheets for any range you require or use the manufactures stats for the round and input that

The ballistic performance of the .22 WMR based off 30, 40, 50 grain is 2,200 ft/s (30 gr), 1,910 ft/s (40 gr), 1,650 ft/s (50 gr). - See more at: http://gundata.org/cartridge/173/.22-winchester-magnum-rimfire-%28wmr%29/#sthash.qVd5FziR.dpuf 22 Winchester Magnum Rimfire WMR Ballistics GunData org

Yes. Any 22 long rifle may be shot using the .22 LR cylinder. Any .22 Magnum can be shot using the .22 Magnum cylinder.

1. Step 1 Take a rifle with a properly installed BDC bullet drop compensating reticle to a rifle range. Using ear protection zero the scope reticle so that the point of impact corresponds to the center of the cross hairs at the distance you have selected - typically 100 or 200 yds.
   
2. Step 2 Determine the trajectory of the specific cartridge you have selected. There are several ways to do this. Ammo manufacturers publish trajectory and wind drift information. There are web based ballistic calculators like http://www.biggameinfo.com/BalCalc.aspx which will tell you how much your bullet drops at known distances.
   
3. Step 3 Scope manufacturers like Leupold can be a valuable source of information about their reticle: "Leupold® Ballistic Aiming System: Boone and Crockett Club® Big Game Reticle aiming system provides a series of additional aiming points to improve your ability to shoot accurately at longer ranges. Nikon also provides good information suggesting the marks on their reticle be used for zero at 100yds followed by circles below representing 200, 300, 400 and 500 yds if the cartridge travels around 2800 ft per sec. Nikon suggests the center cross hair be zeroed at 200 yds for magnum calibers traveling around 3000 ft per sec. We understant that each variation of different bullet weight and powder charge changes trajectory and a scope manufacturer can not build a different reticle for each different cartridge made so practice on the range to determine how well the marks relate to the actual impact of where your bullet strikes at a know distance is important. The one thing that people using BDC scopes typically have problems with is that a BDC scope has the reticle in the second focal plane of the scope. If the reticle was in the first focal plane of the scope the reticle would look smaller on low powers like 3x and grow proportionately larger as the power increased to say 9x top power. The problem is that while the marks on the BDC reticle correspond accurately to the bullet drop at the know distances 200, 300yds etc. What happens when you lower the power from the scopes maximum power to any other lower power is the reticle stays the same size and the field of view within the scope increases which means that the distance between these marks on the BDC reticle no longer corresponds to the point where the bullet will strike. In short BDC reticles only work at the maximum power of the scope or at a set specific power. At all other powers these BDC reticles do not accurately represent where the bullet will strike.
   
4. Step 4 The center X always remains the same. If you zero at 100 yards and you know that your bullet drops 8 inches at 300 yards you could forget about the BDC marks and hold the center X 8 inches high - that works at any power 3x or 9x and should be used at lower powers. If you zero the center crosshair at 100yds and have the BDC scope at the maximum power 9X then the first line or circle below the center X should be the mark you place on the center of the 200 yard target----- the bullet strike should hit the center. If by some chance you put the scope on 3x and placed that first mark below the center cross hair on that 200 yard target you would shoot over the top of the target. This is because as the power of the scope decreases the field of view increases the angle increase and gets wider. You can experiment with known power settings and see at a specific power say 3x what that first circle down corresponds to and make notes because at any set power what the marks correspond to will be repeatable.
   

I got this from a website, hope it helps.

This happens will all firearms. what happens when the bullet leaves the bullet is a decieving "rise" of the bullet. The reason for this is the Line of Sight (Scope View), angles down and away from the Line of Departure (Barrel). The bullet actually never rises and is in fact continally falling away from your rifles Line of Departure but because this is higher than the Line of Sight the bullet seems to Rise than fall to the set distance in the scope (i mention set distance and not zero because you can change your Minutes of Angle on your scope to increase and decrease range)

http://www.rifleshootermag.com/shooting_tips/ballistics_0303/

this is a chart that illustrates what i just said.

now that you understand that you should take a good read into Exterior Ballistics. this is the Mathematics of your fireamrs trajectory ( I say your firearms because your bullet's flight depends on the length of the barel which will vary from gun to gun) this science of shooting will teach you how to understand bullet Grain and Volume relations. understanding the Feet per second of your rounds and how the affects you. teach you about shooting in high pressure and low pressure environments and extremly windy environment.

now there is alot of math to all of this and its hard to find it all on the net and if your not that great at math you can do what i do bc im lazy and im not a sniper im just a hobby kinda guy. '

Sierra Infinity V 6 Ballistics Software. I dl'd mine off the net you might have to buy it depending on how resourceful you are. it is well worth the buy. You can punch in the daily variables (Barometric Pressure, Temp, Humidity, and Altitude) (of couse with your bullet as well) and it will give you a "Cheat Sheet" for those conditions stating Windage and Elevation adjustments per decided incriment (50 yrds is standard) then you take that to the range and (bring a laptop if you got it and arent embarrased (som1 might even help you tune in the variables) hope this helps if not ill check back in a bit to see how you did

You SHOULD send it back. There is something loose inside the scope. Even the worst Simmons scope will get you to 2"-3" group. Also, when you replace it, you might want to consider their (or Nikons) shotgun scopes. They are built to with stand the power of the higher centerfire calibers and magnum shotgun shells.