I plan to use the same bullet weight for both cartridges. I have to stock less variations that way. The trouble I am having is determining what weight bullets I want to use.NICE! Are you going to try and pick one bullet weight for both, or keep separate weight by caliber?
Always likes the XDM's not sure what I never got one...
Indiana allowed 10mm and 40 for deer here recently, with a minimum of a 4in barrel.Been loading for the 10mm since the late 80s. In the beginning I purchased bullets of all makes and weights ranging from 135 to 200gr. Initially I simply wanted to see what shot and how well.
I tested multiple powder and primer combinations and finally settled on 180gr bullets, Win-WLP, and AA-9. My pistol was a IAI Javelina with the 7" barrel. With a healthy dose of #9 it was getting me just over 1300fps. At the time Remington and Winchester bulk bullets were pretty affordable and easily had. That provided plenty of practice rounds and paved the way for the 180gr Speer Gold Dot once it was released.
Since the GD's were released I used them almost exclusively up until a few years back when I started casting. Even so, I still have hunted whitetail and feral hogs for years with lots of success. I have also added a G40 which is just as accurate and just as potent on game.
I found Accurate powder to meter great and run clean with all weights from the lighter 135's up to the 200's. I guess I'm one of those who finds what works and sticks with it. That said there have been quite a few powders come out though the years that were all the rage for several calibers including the 10mm for top end loads. Even so the Accurate line has always done well and never over worked, or over pressured brass.
Good luck with your quest, just one tidbit, don't get hung up on chasing top end velocities, stick to book loads and chase accuracy instead.
I am not super concerned with top end velocities, especially in a carry gun. Part of the reason I wanted 10mm was just to have one lol. Even with milder factory loads like the Hornady critical duty, the 10mm is spitting a 175-grain bullet at the same speed I am shooting 115-grain bullets from my 9mm pistols. That yields a 52% increase in KE. When considering an increase in diameter of 13% and 52% increase in KE of the 10mm bullet, I think even middle of the road loads for the 10mm have a superior amount of stopping power to the 9mm.Been loading for the 10mm since the late 80s. In the beginning I purchased bullets of all makes and weights ranging from 135 to 200gr. Initially I simply wanted to see what shot and how well.
I tested multiple powder and primer combinations and finally settled on 180gr bullets, Win-WLP, and AA-9. My pistol was a IAI Javelina with the 7" barrel. With a healthy dose of #9 it was getting me just over 1300fps. At the time Remington and Winchester bulk bullets were pretty affordable and easily had. That provided plenty of practice rounds and paved the way for the 180gr Speer Gold Dot once it was released.
Since the GD's were released I used them almost exclusively up until a few years back when I started casting. Even so, I still have hunted whitetail and feral hogs for years with lots of success. I have also added a G40 which is just as accurate and just as potent on game.
I found Accurate powder to meter great and run clean with all weights from the lighter 135's up to the 200's. I guess I'm one of those who finds what works and sticks with it. That said there have been quite a few powders come out though the years that were all the rage for several calibers including the 10mm for top end loads. Even so the Accurate line has always done well and never over worked, or over pressured brass.
Good luck with your quest, just one tidbit, don't get hung up on chasing top end velocities, stick to book loads and chase accuracy instead.
Dang you were pretty spot though. Just looked in my Hornady Manual. 40 S&W 180 grain max loads are right in line with the middle of the road loads from the 10mm. 10MM minimum loads hang right around the same velocity as middle of the road loads for the 40 S&Wonly kicker is middle of the road 10mm is right around 40S&W loads. But both offer good energy increases over 9mm.
Long as it suits your needs or wants and having fun! Let us know how your workups go.