I use standard Remington Core-lokt 180gr. Not sure of its ballistic coefficient. I may have to look it up and get back to you.
However, it does fantastic out of my krag for white-tail as well as black bear.

I never shot 210 grain out of my krag, couldnt even tell you what the velocity or spin drift is with a bullet that heavy out of it. I could also find the ballistic coefficient for 210gr. as well.
If youre interested. With that information you can compare and use the right grain for the application.

I found BC information on a 210 Grain .308 caliber (which closely matches the performance of a 30-40)

fps/ mach     Cd        i7        BC(G7)       i1        BC(G1)
1500/ 1.34    0.379   1.033    0.306        0.574   0.551
2000/ 1.79    0.319   1.019    0.310        0.513   0.617
2500/ 2.23    0.280   0.984    0.321        0.494   0.640
3000/ 2.68    0.251   0.965    0.328        0.473   0.668
                Average: 1.000    0.316        0.514   0.619   
               Variation: 0.067    0.021        0.101   0.117

This is for a Sierra Match King 210 Grain G1 and G7. Dont have anything on Lymann, sorry

Hope it helps, and your Krag can shoot much higher than 1500fps. As long as the bore, bolt and barrel isnt damaged or mistreated you can go upwards of 2800+/- fps       

As bolt actions go, Krags do NOT have "strong" actions. It makes no difference which component fails - bolt or receiver - the end result is the same. The single locking lug is the weak point - the shock load is asymmetric, and lug contact area is insufficient for more than about 45000PSI. Lapping the main lug so that the safety rib also bears is a poor fix at best, and doesn't make it OK to shoot hot loads, just may give a bit more safety margin.

If you need more pressure, buy a new rifle which will handle 55000-60000PSI. Enjoy the Krag for what it is. It will do almost anything a .308 will do - but if that isn't enough, get a better gun.

Just my $.02.

I will stick with my statement that Krags have strong actions but weak bolts (due to their single lug). I do not (and did not) suggest that someone try loading and using 308Win pressure level reloads. The factory Remington loads for example are quite potent and perfectly safe with any Krag in good condition. If I owned a long barreled rifle, I would probably not shoot a lot of them (frequently). Also, regarding heat treatment at Springfield Armory, it is not ALL low serial number 1903s that had insufficient heat treatment, just SOME of the early serial numbers and I believe they've identified a particular time period, method and person/s at fault. I've never read that there is any record or account of Krag actions coming apart upon firing like those early 1903s that failed.

Bottom line is - don't exceed the max charge weight or muzzle velocity of published loads. I personally use the Lyman manual for my Krag data but have cross checked it against numerous other books. With the right bullet and slow powder, the Krag can almost match .308 ballistics (note I did not say pressures!).

The 1903 Springfield failures are more complex than most people understand and I want to share a good article. It's a kind of forensic study with a lot of statistical facts rather than rumour and legend. The website is (You need to Login to view media files and links). The low serial number caution is a rule of thumb to ensure safety, and we all seem to need rules of thumb. Improvements in the heat treating process, including "double heat treating" improved quality control but they were implemented because inspectors found that the previous heat treating methods were sometimes done properly and sometimes not, at various times by various workers, with no reliable temperature measurements performed. And, like the Krag, ammunition problems also played a role. Most early 1903s did not fail, a few later 1903s did fail (also suggesting that ammunition was a factor). If the Krag's weakness is the single lug bolt design, the 1903's is the bolt face, which doesn't enclose the case head and relies to a much greater degree on cartridge case strength. The Krag bolt, aside from the single forward lug, has a bolt face very much like the later Remington push feed bolt design, which encases the cartridge head (rim). All rifles, action types and chamberings have pressure limitations, just as these two rifles do. I do not agree that Springfield Krags categorically have weak or improperly hardened metal. They should not be categorized with "low Springfields" as having suspect metal strength. Krags have been used a long time with factory ammo of relatively high pressures, with no known failures (that I know of). I'm continually reading about "weak actions" and using "low pressure loads" with Krags. I've also fallen into the trap of using other poster's terminology and will clarify now that not only is the action strong, I don't agree that the bolt is weak; that word implies a defect in metal strength and that assertion isn't supported by any evidence. It's just a design with limitations, like all others.

Dear mi-fordson:  This thread started getting scary when .308 Winchester Data began appearing.  Your query was about .30-40 cast bullet loads and increasing velocity for Deer Hunting.
  My old 1967 Lyman Manual gave data for Cast Bullet #311290 with Gas Check (#2 Alloy) and 2400 powder:  starting load 17 grains = vel. 1450 f.p.s. and  Maximum Load 22 grains = vel. 1725 f.p.s.
  Caution Caution - This is old data.  (There are also other powders that achieve higher velocities with lower pressure).  Always check current data and multiple sources.  I have not loaded or used cast bullet loads in my Krags.  But the Krag is famous as a fine cast bullet shooter.  (It is very important to know the actual bore diameter of your Krag's barrel).
  There is a Forum called "Cast Boolits".  If you have not checked it out, there is a wealth of information there.  Please always cross check loading data with multiple reliable sources.  Enjoy your Krag and know its limits.