school me on 10mm ammo

[flightsimmer]

While were on the subject of 10mm, if your barrel slugs .400", would it make that much difference if you used .401" jacketed bullets over. 400" jacketed bullets?

Inquiring minds want to know.

The reason I ask is that I can purchase .401 jacketed hollow point bullets intended for 38-40 rifle/handgun or should I stay with .400"?

 

[t-squared]

While were on the subject of 10mm, if your barrel slugs .400", would it make that much difference if you used .401" jacketed bullets over. 400" jacketed bullets?

Inquiring minds want to know.

The reason I ask is that I can purchase .401 jacketed hollow point bullets intended for 38-40 rifle/handgun or should I stay with .400"?

Most everything I've read says to match a jacketed bullet to the bore diameter. Using plated, coated, or regular lead you can "size up" .001 or .002" in diameter which can help with accuracy.

A quick search showing the 10mm bullets for sale at Widener's seems to back this up...https://www.wideners.com/reloading-supplies/bullets/pistol-bullets/10mm-bullets

 

[Sigblitz]

While were on the subject of 10mm, if your barrel slugs .400", would it make that much difference if you used .401" jacketed bullets over. 400" jacketed bullets?

Inquiring minds want to know.

The reason I ask is that I can purchase .401 jacketed hollow point bullets intended for 38-40 rifle/handgun or should I stay with .400"?

Reloading? I've read the profile could be higher. You may have to seat it lower, adjust your powder charge, and crimp it higher.

 

[Sigblitz]

[STRIKE]Also, for cartridges, the 38-40 and 10 mm had 2 different cylinders. The 38-40 was reamed out more.[/STRIKE]

These old cartridges are black powder. Having black powder guns, I should have thought about that.

 

[flightsimmer]

Also, for cartridges, the 38-40 and 10 mm had 2 different cylinders. The 38-40 was reamed out more.

I would be loading 10mm.
But the bullets intended for 38-40 are HP and.401" and have a caniluer which I would not be using.

 

[Sigblitz]

That's a question for the reloaders. I'm assuming it's a straight wall bullet like the 10mm and most 10mm aren't caniler, so should be fine.

 

[Trapper Jim]

Okay so I ordered a 10mm and should have it in a week or two. I already ordered some carry ammo in Horrandy and Gold dot plus a little range ammo like Magtech but I would like to buy a 1,000 rounds of something. I am looking at SGAMMO.com and see Magtech has 1000 rounds of HP for like $300 around 1230FPS. I am a little confused as to what FPS I should be looking for. I see Underwood loaded up to 1700 FPS but I don't want to buy that stuff for the range. Is the 1230 good for 10mm? I will never reload my own rounds so I am just looking for an idea of how many FPS I should be looking for when I am buying range ammo so that I at least know I am shooting a 10mm and not a 40 cal

The 10MM is a fantastic round and I only use American Made or Handloaded ammunition. While it is not quite up to my favorite .41 Magnum, it is an improvement in ballistics over 9 if you can handle it. 10MM Semi autos are harder to master for repeated quick shot placement but with practice one can be efficient. The best semi autos for this round is a premium Longslide all steel 1911 platform IMO. It's purpose for a hunting round is doable but the whole picture for defense paints a different picture. Stay away from cheap ammo watch your crimp on handloads and you can have fun with this round.

 

[chef1231]

It’s a XDM 4.5 with the Trijicon RMR. Powder River is doing the slide now

 

[chef1231]

Okay so I ordered 1000 rounds of S&B for like $300 so we will see how that runs for range ammo I guess. I am going to look into some Underwood for carry too

 

[MrHank]

10mm

 

[rooster]

I’m pretty new to the 10mm game myself but I ordered 1k of lax factory loaded ammo and have shot some sig v crown. I can tell you from shooting both after having a 40 that both are much more powerful than factory 40. When I shot them at the range people stopped to ask what the hell I was shooting lol. Both performed flawlessly from my g29.

 

[Hurtaaron]

I have no science to back this up, but the S&B “feels” roughly the same to me as the Sig 10mm ammo. But, I can feel a significant difference with most of the Underwood hot stuff.

S&B has been good range ammo for me. No issues at all.

 

[DadSmith]

If anyone has any once fired 10mm brass let me know I'll buy it from you. PM me.

 

[Expat]

I have no science to back this up, but the S&B “feels” roughly the same to me as the Sig 10mm ammo. But, I can feel a significant difference with most of the Underwood hot stuff.

Really? I am surprised. I think the difference in the Sig and the S&B as pretty distinctive. The Sig FMJ and the Underwood FMJ in 180 is within 50 fps of each other. So they are closer than the Sig and the S&B.

When I first started buying Underwood it was cheaper than most of the commercial big name stuff. It is just nuts any more.

 

[Hurtaaron]

Really? I am surprised. I think the difference in the Sig and the S&B as pretty distinctive. The Sig FMJ and the Underwood FMJ in 180 is within 50 fps of each other. So they are closer than the Sig and the S&B.

When I first started buying Underwood it was cheaper than most of the commercial big name stuff. It is just nuts any more.

Well, my comparison hasn’t been apples to apples. The Underwood I’ve bought has been either less or more than 180 grain, like the 1600fps light stuff, and the 1200fps heavy stuff. If I saw it had similar specs to the Sig... I just bought the Sig due to the aforementioned Underwood prices.