View Full Version : Fed XM193 actual load data
Does anyone know the powder and actual charge used in the Fed XM193 55 gr ball load? I am getting ready to crank out a batch on the Dillon, and thought I would start my trials with a load as close to XMX193 as possible. Thanks!
Page 10-3 of TM 43-0001-27 has the only offical load info on M193 that I know of.
http://generalcartridge.net/Documents/TM43-0001-27.pdf
5pins
Now if one could actually see where WC844 rates on the burn chart?:confused: I've heard -don't know if it's true that H4895 is a very close sub for it!:confused: Although looking at Hogdons load list BL-C(2) looks to be very close with 27 grs at 51000 psi.
WC844 is similar to H335 BUT it is a non canister powder and will vary from lot to lot. If you use starting load recommendations for H335 you should be OK. Pressure signs can be hard to see in an auto loader.
It would be a bad idea to try to get a starting load "as close to XM193 as possible". That ammo if in spec is already hotter than recommended SAAMI pressures. To try to start at that level is going about it backwards. Start low and work up in increments of .2 or .3 gr. Your gun and body parts will thank you for it.
DBR
I don't know by looking at the Spec and then Hdgdon load list H335 doesn't look to be the same burn rate as WC844 -I would think using less powder (H335) indecates it alot faster burn then WC844 which is using 28 gr per the spec sheet? The BL-C2 load uses 27 gr to get 1000 psi less then the WC844 which would indicate they are close to the same burn rate!:)
DBR
I don't know by looking at the Spec and then Hdgdon load list H335 doesn't look to be the same burn rate as WC844 -I would think using less powder (H335) indecates it alot faster burn then WC844 which is using 28 gr per the spec sheet? The BL-C2 load uses 27 gr to get 1000 psi less then the WC844 which would indicate they are close to the same burn rate!:)
You are comparing 223 to 556 loads. The Hogdon data you are looking at is a 223 load. The M193 data being discussed is a 556 load. Apples to oranges.
WC844 is non canister grade H335. WC846 is non canister grade BL-C(2)/W748
Being non canister grade means they will vary lot to lot and you need to rework your powder loads.
To th OP: start low. Work up with your chronograph and careful inspection for case pressure signs. And I would probably do it in warm weather so you don't end up with something not usable in warm weather.
Chadbag
Grant they are loads for the .223 Rem but seeing the cases are very similar in spec's one can extrapulate loads for both! Using the same bullet wts, case spec and indicated pressures for given loads. The load I used for an example is close to the Mil spec in pressure! Now with a Mil spec'd case of 1.760" vs a Rem spec case of 1.750" in therory will produce a lower pressure with that load of BL-C2 of 27 gr. Granted each rifle/chamber is different! Also knowing that the MAX chamber pressure for the Rem .223 is 55,000 psi we are not in nthe danger zone
in a quality/safe rifle! Given that a knowledgeable reloader could work up loads to the 5.56mm spec using canister powders! When I get a hold of a can of BLC-2 I will definate try it! Reading the TM Iwas really surprised on how much the 5.56mm has been down loaded from the Original Spec of 62,000 psi of the early 60's!!! Especially when the Army still uses the original Test pressure round of 87,000psi to test M16's!:rolleyes:
Chadbag
Grant they are loads for the .223 Rem but seeing the cases are very similar in spec's one can extrapulate loads for both! Using the same bullet wts, case spec and indicated pressures for given loads. The load I used for an example is close to the Mil spec in pressure! Now with a Mil spec'd case of 1.760" vs a Rem spec case of 1.750" in therory will produce a lower pressure with that load of BL-C2 of 27 gr. Granted each rifle/chamber is different! Also knowing that the MAX chamber pressure for the Rem .223 is 55,000 psi we are not in nthe danger zone
in a quality/safe rifle! Given that a knowledgeable reloader could work up loads to the 5.56mm spec using canister powders! When I get a hold of a can of BLC-2 I will definate try it! Reading the TM Iwas really surprised on how much the 5.56mm has been down loaded from the Original Spec of 62,000 psi of the early 60's!!! Especially when the Army still uses the original Test pressure round of 87,000psi to test M16's!:rolleyes:
Just FYI, the cases are exactly the same, not just similar. The differences in 223 and 556 are the pressures loaded to, not the case itself.
I am not sure what you are trying to say here. You earlier said that you were not sure that WC844 and H335 were variations of the same powder (non canister vs canister) with similar burn rates based upon 223 load data on one hand and 556 on the other -- comparing those two. I pointed out that you were comparing apples and oranges. Not very useful.
I did not say that you can or cannot extrapolate 556 loads from 223 loads etc. That is a different issue.
river rat richard
12-05-10, 22:11
have you considered ramshot tac? the sierra manual has 26.3 gr/tac + 55gr bullets as a max 223 load.but pressures in a .556 chamber will be lower.3000fps outof my 16"bcm ss410 midlength. I only get another 10-15 fps with fed xm193. I also get the same velocity with hornady 55 fmj-bt & 55 sp that can be bought in bulk. no extractor swipes or flattened/cratered primers either.and since its ball powder it throws a perfect charge out of a dillon.
Chadbag
What I'm saying is with the Known spec of XM193 of 52,000 psi one can load very close to it with a Canister powder IE BLC-2 27 gr at 51,000 psi! This is with a 3000 psi comfort zone of safety as the Max Pressure is 55,000 SAAMI for .223 Rem! And a big comfort zone as the original pressure spec for 5.56mm is 62,000 psi.
http://www.ask.com/wiki/5.56x45mm_NATO
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