30/100 SMc reloading data

[Forpest]

In another thread someone asked about the 30/100 SMc. to my knowledge only two barrels have been chambered, and I have both. And the reamer. This is a fun long range cartridge, but the limiting factor is the bolt face, which I think uses 505 Gibbs. I am trying to gather useful information, and there is a lot go go thru. As a reminder, case capacity is 100 grains of water. . Thank God for muzzle brakes!

This was By Smalley’s rifle.

The load data should be taken as any - start less and work up. These loads were derived from Quickload, and with more experience By began to see how Quickload needed adjustment.

32”Krieger Barrel
180 gr Nosler ballistic tip

90g N-165. 3382 fps
75g 4350. 3232
80 g 4831. 3192
85 g 4831. 3332

190 gr Sierra Moly coated

91g Retumbo 3286
95g BMG 3116
98.5g 87600. 3184
92 g Retumbo 3340

180 Nosler BT Moly coated
92 g Retumbo 3352
90 g H1000. 3350
96.5 N-170. 3454
86 g N-165. 3268
85g N-560. 3414
87g MRP-2. 3235

85 and 86g7828 3457. High pressure!

Sierra 200
95g BMG 3102

220 LRB

85g Retumbo 3029
90g 50 BMG 2964
92g BMG 2992

210 Berger

91g 50BMG 2907 0.43 group
88g Retumbo 3071 0.86 group
94g BMG 2998. .57 group
92g BMG 2890 .40 group
95 BMG 3036. Bullets keyholes

220 Sierra
86g Retumbo 3048
87g Retumbo. 3083. near maximum
93g BMG 3090. .75”group
90g H870. 0.45” group
95g 50 BMG 3065. 1.02”group
96g H-870 2977. 1.11” group


240 Sierra

88g 50BMG 2850. 0.68”group

I’ll break here!

 

[Kurz]

Pictures of the cartridge and dimensional information of that case would be very educational!

 

[ebb]

Does this have an advantage over the 300 Lapua? If i can remember it holds about 100grains also.

 

[Forpest]

Pictures of the cartridge and dimensional information of that case would be very educational!

I’ll try to remember to take a pic tomorrow. In the mean time here is a table. I have been looking for a reamer print. There are 6 notebooks of data. fascinating reads, and I am easily distracted

 

[Adam in WI]

That .25/60 sounds like a hoot

 

[Forpest]

Does this have an advantage over the 300 Lapua? If i can remember it holds about 100grains also.

I have no data or experience with the 300 Lapua.

 

[Forpest]

Here is a picture of the 30/100 SMc on the left, the parent case 408 Cheytec in the middle, and a .270 on the right. Lots of brass to move! Still havent found a reamer print. .

 

[Adam in WI]

Here is a picture of the 30/100 SMc on the left, the parent case 408 Cheytec in the middle, and a .270 on the right. Lots of brass to move! Still havent found a reamer print. .

I don't think that's a .408 in the middle. Looks more like a .470 Nitro...