What would be a good beginner ml gun for deer?
thanks for helping.

what are you interested in? Any styles, makes, models, calibers, what is the price range you want, and where you live, what is most available?

Check your local game and fish laws. Most states in the US have different requirements. I believe you are in Ontario so you need to look at your area requirements and find out what is legal to use then you can select from the available ones that fit the requirements.

When I started learning to play the guitar, I bought the best one I could afford; they are easier to play, have a much better sound than a "starter" model, and they will maintiin their selling price should you decide to sell it down the road.
I would encourage you to do the same with a MZ gun. If all you can afford is one of the "entry level" guns, then get one. But if you can afford a better one, you'll never regret spending the extra money; you'll have a better quality gun and can sell it for about as much as you paid for it if you decide to do that.
What you first need to do is (as has been mentioned already):
1. Find out what the laws in the state you will be hunting allow,
2. Decide whether you want to go Flintlock, Percussion, Sidelock or Inline,
3. THEN - shop around and ask some more specific questions and opinions here - you'll get lots of good info.

Good Luck

Sorry but I don't know much about ml so whats the difference between flintlock, perucssion, sidelock and inline. Also my budget is up to $250. And I don't know the regulations for ml in ontario.

Start visiting Thompson Center Arms, Knight Rifles, CVA, Traditions Rifles, Lyman Rifles on line and look at what they sell. You will then see the difference between percussion, flintlock, and inline.

Since you're new to the sport it seems I would get an inline and then later when your more comfortable and hooked on this sport, look at some of the traditional rifles as a way to really peak your interest in the sport. To get you shooting with a 250.00 budget, you have the option of going to an Auction Site and looking for a NIB or excellent condition used rifle. Look at the Knights, Thompson Centers, and others. Some times you can get a Knight for $150-300 and they are an excellent rifle. If you find one on a auction site and want an opinion, IM me and I'd be glad to look it over and give you my impressions on it.

The other option is get a new rifle. You would need to look at CVA, Traditions, New Frontier, and/or Winchester where you might find on for the kind of money you want to spend. Also considering where you live and the kind of animals you encounter, stick with a .50 caliber fast 1:28 twist rifle.

For an inline you could go with the CVA Buckhorn. You can get it with a scope, starter kit, or both for cheap. Then you have leftover money to get powder and all the other good stuff. I also know of some good traditionals for around $230 but that would not leave you much room for accessories. Muzzleloaders come in calibers from 32cal to 75cal and some are even larger. I would get a 50cal or 54cal. The 50cal should do you good. I like traditional rifles myself but some like moder styles. I like to be put back in the 1800's. Here are some pics of both.
http://www.cabelas.com/cabelas/en/templates/pod/horizontal-pod.jsp?_DARGS=/cabelas/en/common/catalog/pod-link.jsp_A&_DAV=MainCatcat20712-cat20815&rid=&indexId=cat20815&navActi on=push&masterpathid=&navCount=5&paren tType=index&parentId=cat20815&id=0027579

Here is an inline. So what do you think you like better?

Before you do any buying check the laws of the state or providence you live in to see what is legal they often control what you can use for deer. Lee

After you check the requirements for legal hunting I agree that one of the newer style inlines is the way to start with the least to learn and the most reliability. You will eventually most likely get interested in the more traditional styles after you get some experience. One inline that is quite good and all American made and supported is either the H&R Sidekick or the NEF Huntsman. I think you can get them for less than $200. I have a Huntsman and it is every bit as good as the T/C Omega that I spent three times as much for. In fact as delivered it is more accurate than the Omega as the Omega synthetic stock has to be pillar bedded before it has any decent accuracy from one cleaning to another.