I'm a fan of the
CCI/Speer 200 gr Gold Dot JHP bullet in .44 caliber. It's a gaping hollowpoint specifically designed to expand at moderate .44 Special velocities. The (relatively informal) ballistic tests I've read pronounce it a success.
http://www.milesfortis.us/mcump/mc15.htm
http://www.gunblast.com/Cassill_Bulldog.htm
You can get this bullet in factory loaded defense ammo in two formats: (1) the
Speer Gold Dot .44 Special round (in nice, reloadable nickel-plated cases) or (2) the much cheaper
CCI Blazer .44 Special (in non-reloadable aluminum cases, but still high quality ammo). Of the two, I prefer the Blazers -- same nice accuracy as the Speer version, and my subjective impression is that the Blazers are loaded a little hotter. Of course, I am shooting these rounds in an N-frame S&W 629, so recoil is no problem. You might, or might not, find them a bit brisk in the Bulldog.
But both are strong options -- definitely try a box of each.
The
PMC 180s are accurate and easy to shoot. However, they are an old-tech SJHP design -- it's questionable whether they'll expand at .44 Special snub velocities. The one test of the PMC round I've read (Cumpston's, linked above) reported failure to expand when launched from a 4" barrel.
There's also the
Winchester 200 gr Silvertip JHP in .44 Special. I don't like it for carry because it's loaded rather light (around 720-750 fps) --
but, the Silvertip appears to expand well even at those low velocities. If you find the CCI/Speer rounds recoil excessively in your Bulldog, you might look at the Winchester.
Finally,
Cor-Bon has a new
200 gr DPX defense load in .44 Special that is extremely promising. It has been clocked in the 1000 fps range with perfect expansion from the all-copper DPX bullet.
http://www.hipowersandhandguns.com/Corbon 44 Special DPX Report.htm
If you can find a source for the Cor-Bon DPX ammo, can handle the recoil in your gun, and can afford it ($34 / 20 rounds!), I think it will prove the one to beat.*
* PS: Cor-Bon has also traditionally offered a
165 gr JHP load in .44 Special with a more standard JHP bullet. Previous versions of it were listed at 1150 fps on the box and produced numbers that were even more dazzling -- as in 1200+ fps from a 4" barrel! I shot a few boxes of it in my 629 and it is/was impressive ammo. Accurate, though loud and flashy. Basically, it turned the .44 Special sixgun into a hot 10mm.
Recoil was easily controlled in my 41.5 oz Smith & Wesson revolver. Your little Bulldog might be another story.
Interestingly, while this traditional JHP 165 gr load is still offered by Cor-Bon, they are now listing its velocity at a mere 1050 fps.
https://dakotaammo.net/shop/index.php?cPath=21_45
OK, only in the context of Cor-Bon does it make sense to talk about a "mere 1050 fps" from factory .44 Special ammo -- but still -- were people having pressure problems with the previous, hotter version of the 165 gr load? Were the bullets flying apart at 1200 fps? (I've read one report to that effect; some people think it's a good thing.)
Cor-Bon strikes me as a stand-up company; surely they wouldn't deliberately download their old .44 Special round just to coax their customers into ponying up for their new ultra-expensive DPX round.