Reloading 10mm auto?

[41 Mag]

Richard, if I may,

When you get a chance to look the Golden Saber over, looking at the side from nose down towards the base, you will notice that they have a reduced area which ends about at the end of the Ogive, just ahead of the straight portion of the jacket. THey have a two diameter jacket on them which compared side by side with the same weight of another brand they will be a bit longer. However the reward portion of the bullet acts more like a driving band where the nose section is riding along on the tops of the lands, more or less.

This should not give you higher pressures, using the same laoding data for the same weight bullets as there is less function of drag created by the two deminsion jacket.

Hope this helps.

 

[zeeew]

I have been asking this same question on a few boards, and overall Accurate #7 and #9 seem to get mentioned most as "go-to" powders, with Blue Dot running right behind the AA powders. Some seem to use Blue Dot in a lot of different calibers and are quite pleased with it.
800x is by far the most common top velocity powder.
I dont have any actual experience yet loading the 10mm, I just got a chrono and some Power Pistol to try though, so slowly I will add what I find, FWIW.

 

[steve4102]

Hi guys, I'm new to the 10MM myself and appreciate all the great info. I have a question about AA #9 with 180gr bullets.

Bringsteen posted this data.

In the Complete Reloading Manual for 10mm/.40 S&W, the hottest Accurate #9 load for a 180 grain bullet is 14.5 grains. This yields 1290 fps at 32,600 psi.

Accurate's web data is quite a bit different. They list 13.5gr as Max at 1242fps with 34,100psi. Any idea as to why the big difference?

What about Ramshot Silhouette in the 10mm? Ramshot lists 8.4gr Max at 1210 fps with 34,400psi. I have a few jugs for my 9mm and 40 S&W and I thought it may be a good choice for my 10MM as well. What do you think, anyone try Silhouette?

 

[Casefull]

A glock 20 and eaa witness in 10mm.
I have found the heavier bullets work better(more of the powder burns in the barrel). I am getting great velocities with 800x and brass is fine. I wish I could get the witness to not throw the brass 25 feet. That is with the heavy spring. Is part of the problem the lighter weight of the slide? Could anything be done with the ejection rod?

 

[GJgo]

Steve- Accurate's 13.5gr on their website is, as I recall, the max charge for using magnum primers. 14.5 is for standard.

 

[41 Mag]

Steve,

I have never used or had access to the data which was quoted. I do however know that with the same type powder, and different bullets from different manufacturers you can easily get differing pressures. Other things, like what they used to test the loads in, being a pressure barrel or an actual firearm will also change data. Things like the atmospheric conditions, barometric pressures and temps will all add from slight big changes in data.

If you look at the data on the Accurate site you will see the following which is my point,

..........................Min....Vel...Max...Vel...Press...OAL
No.9 180 HDY XTP 12.2 1,093 13.5 1,242 34,100 1.250
No.9 180 RAN HP ..12.1 1,086 13.5 1,235 35,500 1.260

Both are the same weight, loads are pretty much identical, but the pressure is higher on the latter. As for the difference in primers the Accurate loads used WIN - WLP which is the standard large pistol primer.

Switching to a mag primer in this size case will get you up there in pressure quickly, and in my experience is not needed with the burn rate of these powders.

My personal 180gr load uses 13.5 of AA #9 which gives me 1350fps from a 7" barrel in my IAI Javelina. This is a top end load in my gun, and if you choose to head there work up slowly in small increments.

Ramshot powders that I have tried have been working fine for me, however I haven't loaded any of the pistol powders as of yet. I mostly have been using the rifle powders. I do read good things here and there about them.

Casefull,

I hear ya, and don't know what to tell you that would help. Mine has a SS slide that goes the full length of the 7" barrel, coupled with the heavy spring, and it still chunks them out there a ways. I resigned to using a king sized sheet when I shoot just to help corral them. I prop up the outer corners with dowels, and make it so it sort of funnels them into a pile on the close side. This however isn't always applicable depending on where I shoot. When I can't use it I try to have the wife or a friend stand back and spot for me, and if I am hunting I simply try to keep the older cases loaded up as I know up front they will be lost forever.

 

[rattinox]

my own bleeb on 10mm loads

I've been a proponent (rabid, raving nutcase) for the 10mm since I first read about it in G&A back in the late 80's. Alot of intelligent thought went into this round. With Fathers like Whit Collins and Jeff Cooper, how could it be less than excellent?

Give Vihta Vuori N105 a try sometime.

For the heavier bullets like 190 & 200 grain, this powder seems tailor-made for accuracy and max power at the lowest pressure. I don't like to push pressures in the Ten, but I do like to get the power of the original Norma loading (200-grain @ 1300fps) and N105 delivers. My Glock 20 loves nothing else.

 

[ReloaderFred]

The original Norma load for the 10mm Auto was a 200 grain bullet at 1,200 feet per second, not 1,300 fps.

I've owned and shot 10mm pistols for many, many years, and have loaded a truck load of ammunition for them. I'm very familiar with the original loading and have some in my stock of 10mm ammunition.

Hope this helps.

Fred