Originally Posted by
oksmle
seabreeze133 .... I currently have a Springfield Mod. 840 in .30-30 cal. This is the "cheap" version of what you have. The barrel is 18 1/2" & all the load data listed below is from this carbine. If you have the longer rifle the same loads should clock a little faster for you. I have made a .38/55 & a .35/30-30 from previous Mod. 340s. Works just fine. I would not attempt the .375 Win, even though mechanically it's as easy as the .38/55. It is equipped with a 2 1/2x Burris scope that is probably decades older than the carbine. BTW, I purchased the carbine in 1983 for $25.00 in front of a Pawn Shop after the Pawnbroker refused to give him anything for it due to a broken stock. Then I traded a Beagle puppy for the scope & mounts to a "best friend" & enjoyed training & hunting with the Beagle for the next 15 years. But that's another story. Here's a mess of loads. Be aware of the #311284 when it comes to OAL. The magazine in my carbine is such that I have to adhere to the 2.55"OAL. This means the GC is sticking below the shoulder when loaded. Dosen't hurt a thing. You might get away with a bit longer. I eventually modified the #311284 to a top pour mold, & while doing so I made the cutoff sprue into the size metplate that would allow me to seat the boolet out a bit. The rest of the loads present no problem.
Remington cases dedicated to this firearm. Fireformed & neck sized only. Remington LR Primers. Boolits are straight WW.
1. #311284 (unmodified) 210.0 grs. 33.0 grs IMR 4350 - 1786 fps.
2. #311284 (modified) 200.0 grs. 33.0 grs IMR 4350 - 1802 fps.
3. #310195 Old West 195.0 grs. 34.0 grs IMR 4350 - 1871 fps.
4. #313492 (wadcutter) 93.0 grs. 4.6 grs Unique - never cron. this load. 5 shots in one ragged hole at 25 yards.
5. #311291 185.0 grs. 33.0 grs IMR 4350 - 1818 fps.
6. #311291 185.0 grs. 33.0 grs IMR 4831 - 1727 fps.
7. #311291 185.0 grs. 34.0 grs IMR 4831 - 1825 fps.
oksmle