Load data for M193 and M855 with Lake City Brass

[Thirdeye]

I've got some 55g M193s and 62g SS109s that I want to load up in Lake City Brass. Powders are IMR 4198 and Ramshot Tac. Primer, CCI 400.

What's a good starting load for each of these that will cycle a 16" LMT? I'm just looking for blasting ammo.

[markm]

I'd go with the Board's standard load of 24.5 grains of TAC behind the 55 gr FMJ bullet. You will get a lot of ammo per pound of powder, and it runs really well on a wide variety of gas systems.

It's not a hot load, but you'll get a lot of good running blasting ammo. You could also leave your powder setting at 24.5 for the ss109 bullets too. This would make the ss109 load a little hotter, but still well below max.

[Thirdeye]

Great. Thanks. Any loads for the IMR 4198?

[Paulinski]

I'd go with the Board's standard load of 24.5 grains of TAC behind the 55 gr FMJ bullet. You will get a lot of ammo per pound of powder, and it runs really well on a wide variety of gas systems.

It's not a hot load, but you'll get a lot of good running blasting ammo. You could also leave your powder setting at 24.5 for the ss109 bullets too. This would make the ss109 load a little hotter, but still well below max.

Did anyone try that load with 12.5" LMT Piston? Mine only seems to cycle 5.56 pressure ammo and hotter re-loads.

[markm]

Did anyone try that load with 12.5" LMT Piston? Mine only seems to cycle 5.56 pressure ammo and hotter re-loads.

This comment isn't meant to stir shit, but....

I thought the idea of a piston was that it is supposed to be forgiving on ammo types.

I don't know of anyone trying this load on that exact set up, but the load seems to run good on a wide variety of gas lengths due to its slower burn rate.