I've had to trim some 44 mag before but that's because they came from the factory at maximum length and after one firing were slightly above max. I most likely didn't HAVE to trim them but I did just for good measure. Any case that's too long would need to be trimmed but straight wall cases just grow so slowly compared to bottle neck the cases usually fail before they need to be trimmed.
Luckey: Lutnit pretty much sums it up, when it comes to straight wall case trimming. There are a couple of sources for 44 Special components....brass....which may be of use to you. Rusty Wood Trading Company. Has Starline .44 Special brass listed as currently in stock. The other is Higginson Powders. Higginson usually stocks Winchester brass. May have some in stock. Ellwood Epps is usually another good source. Epps might even have loaded ammo. There are likely a few more, but these should get you started.
I load quite a few 44 special loads but just use 44 mag brass since it's easier and you don't get dirt rings in your chamber from the short brass. I keep them in boxes that are clearly labelled but if if they got mixed up, they'll only chamber in a 44 mag anyway so there is no real concern.
I have seen 44 special brass around here and there in small stores but it isn't as common. I've heard of people trimming 44 mag down to 44 special but other stories talk about issues with case wall internal taper/thickness. I've only seen factory ammo in 44 special a few times but I don't really keep an eye out for it. At $1/round for 44 mag it's an excellent candidate for reloading.
If your firearm is chambered for 44 mag and you want 44 special, just use 44 mag brass. For me it's somewhat easy to keep track of as my cast SWC's are 44 special only while my RNFP and all jacketed bullets are magnum.
Fair enough. I do have to warn greatly against doing the opposite though. Some guys like to hotrod the smaller 44 special cases because they have them and want near-44mag loads but that can be very dangerous if they accidentally get chambered in a 44 special only firearm. Of course 44 special is somewhat rare (at least compared to 38 special) so it isn't critical but I still wouldn't do it.
The Bullet Barn is showing Starline 44 Russian, Special, and Magnum brass as in stock. All $20/50 and $37/100.
Starline brass is quite good. I use a bunch of it for 44 mag and 45-70 and it holds up very well.
44 Russian is essentially the same cartridge but even shorter than 44 special. It can be fired in most guns chambered for 44 special or magnum but has feeding issues in some lever rifles because of its length.



























