40 S&W 180 Grain XTP with unique


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jim8115
December 25, 2011, 10:03 PM
Anyone have data for this combo? Alliant only shows a gold dot, Hornandy doesnt list unique, etc. Anyway I have manuals , but the spread that they call for concerns me ( since it isnt this exact bullet ). I am currently using 5.5 unique set at 1.125. I was wondering what others have used, and maybe even chronographed.

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rcmodel
December 25, 2011, 10:24 PM
Before ATK bought out Speer and Alliant, the 2002 Alliant powder guide listed 6.4 Unique MAX, with an unknown 180 JHP, giving 1,065 FPS at 33,800 PSI.

A 10 % reduction starting load would be 5.8 grains.

I have long used 6.0 with a 175 lead cast TC bullet.
7.0 with a Rem 165 Golden Saber.
Both kick harder then a factory load, but seems fine on pressure.

I am not a believer in pushing the .40 S&W to max pressure with used brass, at least in my 1st. Gen Glock.

So, if it were me, and not you doing it with a 180 XTP?
I might try 5.5 starting and work up to no more then 6.0 MAX.

Disclamer: Not tested, and I'm not liable, cause it was me, not you, doing it!!

BTW: An early UMC 180 TC-FMJ factory load used 4.5 grains of unknown powder.

rc

jim8115
December 25, 2011, 10:34 PM
That is exactly why i havent gone over 5.5, until I can chrono some rounds, and see where I am at.............Thought maybe some folks out there may have some experience with that exact bullet/powder combo

bob40caliber
December 25, 2011, 10:44 PM
I have used 6.0 gr. of Unique with that bullet and have it be reliable
and accurate.

gofastman
December 26, 2011, 01:40 AM
I am not a believer in pushing the .40 S&W to max pressure with used brass, at least in my 1st. Gen Glock.
oh come on, live a little! :D
(or is that the point)

bds
December 26, 2011, 01:58 AM
I am not a believer in pushing the .40 S&W to max pressure with used brass, at least in my 1st. Gen Glock.
oh come on, live a little!
I am with rcmodel in regards to 40S&W and not using max load data for mixed range brass in less than fully supported chambered barrels. Do you know how many times that range brass has been reloaded? Or at what load data/pressures? Perhaps loaded several times at over max load data, only to have the "guppy/beer belly" bulged case resized down on Undersized/Push-through sizing dies because the regular resizing dies couldn't and the reloader didn't want to reuse the weakened brass and left it on the ground when you picked it up? ;)

For me, if a 40S&W case won't resize down using regular resizing die to fall freely into my Lone Wolf chambers, it gets tossed to the recycle bin as I consider the case base overstretched and possibly weakened. Better safe than KaBoom. :)

The below warning accompanies Hodgdon load data (http://data.hodgdon.com/cartridge_load.asp) for 40S&W which lists average max chamber pressures of 33K PSI. As far as I know, this warning only accompanies 40S&W load data. No, there's no warning for 10mm even with listed average max chamber pressures of over 36K PSI.
This data is intended for use in firearms with barrels that fully support the cartridge in the chamber. Use of this data in firearms that do not fully support the cartridge may result in bulged cases, ruptured cases, case-head separation or other condition that may result in damage to the firearm and/or result in injury or death of the shooter and/or bystanders.

Casefull
December 26, 2011, 05:29 PM
I regularily shoot 180 xtps in my sig 226 with 7.0 unique. It chronos between 1150-1200.
I reload the cases multiple times without any problems. I shoot a lot of 10mm and the 40 sw case stands up a lot better than the 10mm does. It is the small primer pocket. I make no recommendations as to the safety of this loading as it is only for my use. The idea that 40sw is a wimpy round is internet ignorance. I shoot a lot of 45acp and 10mm.
The more I load and shoot the 40 the less I use the other rounds. You get more energy for the same amount of powder in the 40 than either of the larger cases. What I like is 40 brass is laying around. I have never purchased one round of ammo or brass for the 40. In fact the only reason I first purchased a 40 caliber is 'cause I had all this brass around and the 10mm dies, so why not. I started with the 6in wolf barrel for my glock in 40 caliber. Good luck.

bds
December 26, 2011, 07:50 PM
Interesting ... learn something new everyday. :D I have been thinking about getting a 10mm or work on some 9mm major loads ... something to think about.

I shoot a lot of 40S&W reloads using mid-to-high range load data of W231/HP-38 and makes for a pleasant range trip where I can focus more on drills and shooting techniques instead of just beating up the poor wrists. :D

Although there is good amount of 9/40 brass at ranges I shoot at, 45 has been a popular caliber and often there's more 45 brass in my range bag than any other caliber. Guess it depends on where you shoot.

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