LPP in 45-70 load

[RiskyBusiness]

Any experience with this? from my understanding theres only a thousandths of an inch height difference from LRP. I've read success of others using SRP in small pistols. A few threads of mixed discussions but i wanted Calguns thoughts.

[Divernhunter]

I would just use the proper primer which is the large rifle primers. But that is just me. If they are trapdoor loads then maybe if I did not have rifle primers.
It is not that hard to get the proper primers.

[RiskyBusiness]

Just called Phillips in Covina and they were nice enough to explain the how pressures differ and it wasn't worth any troubles they could get me in. He's right, i'd only be saving 2cpr if i were to use the LPP stockpile i have lol besides one box at $30 will last me a really long time for this caliber

[mjmagee67]

My question would also be what are loading for? Ruger 1 or an Old Trap Door? Loading for the Ruger I wouldn't recommend it, since it is a very high pressure round. A Trap Door load, would be OK since they are less pressure than 44 Mag. For the seating depth, you would just have to see if your gun will pop them. Another issue could be igniting the volume of powder in the 45-70, what powder are you using and is it an easy ignited powder?

I guess the answer is it just depends.

[RiskyBusiness]

My question would also be what are loading for? Ruger 1 or an Old Trap Door? Loading for the Ruger I wouldn't recommend it, since it is a very high pressure round. A Trap Door load, would be OK since they are less pressure than 44 Mag. For the seating depth, you would just have to see if your gun will pop them. Another issue could be igniting the volume of powder in the 45-70, what powder are you using and is it an easy ignited powder?

I guess the answer is it just depends.

it would be for a 1895 marlin. looking at those reduced loads of 10-13gr of unique. read on marlin forums it'd be okay to use LPP for reduced loads but i havent found info on calguns about this.

[Tom-ADC]

Used to use LPP when loading black powder worked fine with good accuracy, I had read the bench rest guys were using them. Not sure I'd use them with smokeless powder.

[RiskyBusiness]

I only found a handfew that used smokeless and they said they've shot thousands without problems using reduced loads. I went ahead and got me LRP but I'll still make a small batch of 5 with L.P. to test it

[mjmagee67]

it would be for a 1895 marlin. looking at those reduced loads of 10-13gr of unique. read on marlin forums it'd be okay to use LPP for reduced loads but i havent found info on calguns about this.

Well they say 45-70 lever guns are good to 40000psi-45000psi. I figure a standard LPP round might be 38000 to 40000, so I would tread lightly but work up and watch for primers signs. I know people use rifle primers in the giant handgun Mags, like 460 S&W, 500 S&W etc, etc.

[Dutch Henry]

I would suggest using only LRP in .45-70. LP primers have a cup height of 0.115 to 0.125 inches. LR primers have a cup height of 0.123 to 0.133 inches. These are SAAMI dimensions.

Consider if you have a load using a LPP and you have a minimum length firing pin: The ammo may not fire and you'll have to spend a lot of time breaking it down to install the right primers.

http://www.bearblain.com/images/Primer%20and%20Primer%20Pocket%20Dimensions%20SAAMI.png

[RiskyBusiness]

All five test loads went bang. Will continue to test more but from what I read and experienced these are good to go.

[Whiterabbit]

Guy on CB only shoots 45/70 with LPP.