Just got into 10mm earlier this year but have been reloading for close to 50...
Was wondering what everyone is using for a penetrator hardcast load. I've looked at two molds from Accurate, a 200 and a 220 and am leaning toward the 200 as it will give a little more velocity.
The Sectional Density of a 200 .40 is the same as a 210/.41, 225/.44 or a 255/.45. The 220 would be equal to a 230/.41, 260/.44 or a 295/.45.
I'd like to run these in the 1200s and think that it would be easier to do with the 200...
Thanks...
Thanks...Bob
I personally prefer 200 grain bullets. My two favorite molds are a Mountain Mold that drops a 205 grain (with lube) WFN:
(http://fellingfamily.net/images/MM_205_FRN.jpg)
And a NOE mold that has HP pins for a 180 grain HP or 200 grain WFN with the flat pins installed:
(http://noebulletmolds.com/NV/images/403-200-HP_(PB)__183_gr_Sketch.Jpg)
I have arrived at the same conclusion as you have: Above 200 grains you lose velocity faster than you gain SD is my opinion. Some of the boutique guys like Underwood push heavier bullets pretty hard, but they sometimes don't run reliably in all platforms due to the recoil impulse.
If you want a middle ground, the Accurate 40-210B from page 8 of the Accurate catalog might be a good option. I really like my 205 grain, and have often though a 210 would be great as I think it could still be pushed to 1200 fps without going extreme in the load like you have to to get a 220 there.
Bob, Welcome to the Forum and to the world of the 10mm! You are correct the 200 will yield a bit more velocity because it leaves a bit more room for powder to get them going. The increased velocity can translate to longer range as well.
There are several mold companies to include NOE and Mountain Molds and some offer options for hollow points. The MEPLAT or wide nose profile can cause you to have to seat deeper due to the change in tipping angle of MEPLATS at 0.280" to 0.300".
COAL of 1.4240" was seen with some MEPLATS at 0.320" for better feeding properties. So finding a balance of load to pressures is needed.
Some of the guys may have the Accurate Mold you speak of maybe they will drop by.
I have the RCBS 200 grain which has a slight SWC design which is good for cutting clean holes in paper, with my alloy they are dropping at 208 grains. They have worked well for me and feed great. I wish I would have gotten the Lyman 200 grain Truncated Cone before they were discontinued.
Good luck with your decisions. :D
Thank you for the welcome and the replies... My other two favorite cartridges are the .41 Magnum and the .38 Super. So liking the 10mm goes right along with my Cult personality... ;D That said, if in 1980 when I dropped the .45 and went to .38 Super, if the 10mm had been available I would have probably gone that route..
I will look at the other suggested boolits....
Thanks again...Bob
My 38 Super comes in the form of 357Sig and 9x25Dillon form the 10mm pistols with a barrel swap...
SQL
Is that Mountain Mold bullet your design, or a stock offering?
Their website doesn't seem to have a catalog.
Thanks!
I have a Glock 40 with Lone Wolf .357 SIG barrel that I use for home defense instead of the 10mm. Also have a 19 with an extra 23 slide that has the stock .40 barrel and a LW .357 SIG barrel. If I was back in LE the .357 SIG would be the round I would want...
Starting to look more at that NOE 200 with the HP pins. I have several MeHic molds with the pins and they sure are handy.
Quote from: Benchrst on September 09 2016 09:05:05 PM MDT
SQL
Is that Mountain Mold bullet your design, or a stock offering?
Their website doesn't seem to have a catalog.
Thanks!
Well...not really either.
It is a custom design, but I didn't design it. I got it in trade for some lead. They guy I got it from had it made for a 38-40, but decided he like another mold better.
I think the NOE mold above is superior for a 10mm auto to be honest. And I think the Accurate 40-210 would be a great option too.