This is a follow – on thread to my “Need help with feeding problem thread”.
http://www.cascity.com/forumhall/index.php/topic,49487.0.htmlSince I’m over the feeding difficulties and on to shooting, I thought it best to start a new thread to document my shooting and load development.
The Model 1871 Springfield Spencer is an oddball rifle. For those who may not be familiar with these rifles, I’ll offer a summary. Springfield Armory made up around 1100 of them from model 1865 Burnside carbines using, for the most part, left over parts from other rifles. The 32.5” barrels with sights are left over Model 1868 trapdoor parts. The fore ends are very likely left overs from the Model 1870 Springfield Remington navy rifles. The cleaning rod is from the Model 1868 trapdoor as well, but is shortened to 29.5” fit the fore end. If you look at a photo of this rifle, you’ll see that the cleaning rod looks short. It IS short! It was cut short so the cleaning rod catch in the fore end would engage the locking recess in the cleaning rod and hold it firmly in place. So the rod is about 3” too short for the barrel, thus useless. Very odd indeed and very un-Springfield like. It almost seems like building these rifles was someone’s idea of busy work to keep the skilled workers at Springfield employed during austere times, but not requiring much in the way of new materials.
This rifle has a long chamber and after a lot of experimentation, I determined that it needs a long cartridge to feed well. I cut my .50-70 Starline brass down to 1.356” and load to an OAL of 1.680” - 1.684”. Here is a Starline .56-50 case on the left, same case with bullet loaded to 1.680” OAL and my long case loaded to 1.680”
The longer case that fits my Springfield Spencer is surprising close to the .50-45 center fire cartridge used in the Springfield-Remington Model 1867 navy cadet rifles. There were two versions of this cartridge. One case was 1.275" long, the other was 1.332" long. The 1.356" length of my cases is not based on historical precedent, but simply the length I came up with after determining what I think is the best OAL using a Lyman 515139 bullet. After determining best OAL, I measured to where the case mouth would just cover the forward driving band. The difference in case length between the Model 1867 Springfield navy cadet rifle's 1.332" long case .50-45 cartridge, and my Model 1871 Springfield Spencer's 1.356" long case is only .024". Very similar indeed. Coincidence? maybe. I could easily trim my cases to 1.332” and they would work fine. Enough background - on to the range.
This was the first time to the range with this rifle, so I only loaded a small number of rounds. My primary goal was to safely test fire it and verify proper feeding. Since I worked with the Lyman 515139 bullet to determine OAL length, this is what most of my rounds were loaded with. Here is the load:
Cut down Starline .50-70 brass
Lyman 515139 bullet, about 20-1, SPG lube, sized .515”
45 gr by vol of Swiss 1.5F (49.3 gr by weight)
Federal large rifle primers
Powder poured though 24” drop tube
One .030” veg card wad, one newspaper wad.
Load compressed .100”
Bullet seated to 1.680” and lightly crimped. A light film of grease was applied to the bullet’s nose to aid in feeding.
I fired three 5 shot groups at 50 yards from a rest. All three groups consistently went 5” – 6”. Not very good. I was using the original military sights and my 55 year old eyes aren’t what they used to be. So I wondered if it was me or the rifle. Almost as an afterthought, I had loaded 5 additional rounds with the Rapine 350T bullet, same alloy, size and lube. Everything else was the same as the 515139 load. My primary intention was just to check feeding using this bullet. I loaded all 5 in the magazine and they cycled up just fine. So I fired them at the same 50 yard distance. I was greatly surprised and pleased to see them go into a much better group, about 2.5”. Nothing to get too excited about, but a big improvement over the 515139 bullet.
So I will focus my future loading with the Rapine bullet and see if I can tighten up this group a little more.