Ruger American .450 Bushmaster-alternatives to factory flush mags?

I have a Ruger American I bought about 3 years ago for deer hunting. Its a .450 bushmaster and has a flush fit 3 round mag. The stock is solid, it doesn't have a removable mag well or any panels that can be taken off.

I haven't had any trouble with it so far but I have read bad things about the factory mags and would rather not spend $40 on them, and I would also like to have a couple that hold more than 3 rounds if possible. Its such a handy rifle it would could easily do duty outside of deer hunting.

Does anybody make bigger mags that fit it? Is there a different stock that would let me use different style mags? I have tried to do some research myself and I am finding some options for .223 or .300 black out rifles, but haven't found anything in .450 that I know for sure works with my rifle. There seems to be a lot of variations made in the last few years with ranch rifles, predator rifles, etc. and I'm not real clear on what fits my rifle at this point.

I have a feeling I could buy another rifle in .223 that takes AR mags (at least before the current panic) cheaper than I could modify this but I thought it was worth looking into.

Thanks for the input everybody. Sounds like an expensive proposition any way you look at it. Honestly, I just feel like I should have a spare mag for the rifle and when I saw the factory mags were $40 and got 1 star reviews on the ruger website I thought I'd look into other options.
I like the general idea of a short handy bolt gun like this with a decent sized detachable mag as a truck gun, but a lighter caliber would be more useful. .450 is a bit heavy for shooting the invading possums and skunks in the barn. It appears like I could buy another rifle for the same cost as upgrading. Not worth worrying about until things calm down though.

jmr40 said:

The issue with Ruger American mags is everything but the 450BM mags. Many guys, myself included, have bought the 450 BM magazines to use in 308 or 6.5CM rifles. The ones that take AI and AR mags work fine as do the single stack 450 mags. It tis the 4 shot flush fit mags for other calibers that give issues.

You can get them cheaper at Midway than Ruger

https://www.midwayusa.com/product/1018876132?pid=126955

Click to expand...

Good to know. I really couldn't see what would be problematic with the factory mag that I have other than it feeling a bit fragile, but the reviews on the ruger website were pretty terrible and people never include any details about the mag or cartridge. I will have to pick up another OEM mag one of these days.