Reducing loads safely

[LeftHandGuy]

Hi all,

I have Marlin 336 in 35 Remington and a ton of plated 357 pistol bullets. I'd like to find a load that duplicates 357 mag velocities without creating pressure spikes or anything else stupid.

Are there any good general principles to reducing published load data?

There are published loads for 158 grain pistol bullets, but I want to bring the MV down to below 1600 fps ideally (assuming that I treat plated bullets as requiring cast bullet velocities).

I was thinking of 18 grains of IMR4198.

Please feel free to point out any fallacies in my assumptions!

Thanks.

 

[Smellydog]

I am soooo jealous. Always wished I'd had a 336 in 35Rem.
I personally would not do a reduced load on that powder.
I'm sure if you Google it options will appear using some shotgun powders.
I would stick to flake powders or extruded.

 

[LeftHandGuy]

I am soooo jealous. Always wished I'd had a 336 in 35Rem.
I personally would not do a reduced load on that powder.
I'm sure if you Google it options will appear using some shotgun powders.
I would stick to flake powders or extruded.

Thanks. FWIW if you ever find yourself in my neck of the woods drop me a line and you can come shoot it.

 

[Cloudhopper]

Down-loaded my cousins .20TAC with H4895. You're probably aware of the drill: if your cartridge is listed with H4895 you can use 60% of the max published load as the minimum load. It worked well with 16.2gr giving around 2250fps. I believe H4895 is unusually good among propellants for burning consistently at lower pressures.
CH

 

[Muir]

H4895 is great for reduced loads but..... especially in the 35 Remington.... make sure you keep the pressures up. The 35 Remington has a very scant shoulder and no rim. With very light loads there is a tendency to have the shoulder set back with multiple firings which gives immediate problems with ignition, but problems more severe when you switch back to full power loads. I never had a marlin but I had a Thompson Center handgun and I ended up adjusting the headspace every few loadings by seating a 210 grain "Super Police" 38 Special bullet into the lands and fireforming the case back to chamber spec.
Might not ever happen with your Marlin but it's an issue for some. ~Muir

 

[LeftHandGuy]

H4895 is great for reduced loads but..... especially in the 35 Remington.... make sure you keep the pressures up. The 35 Remington has a very scant shoulder and no rim. With very light loads there is a tendency to have the shoulder set back with multiple firings which gives immediate problems with ignition, but problems more severe when you switch back to full power loads. I never had a marlin but I had a Thompson Center handgun and I ended up adjusting the headspace every few loadings by seating a 210 grain "Super Police" 38 Special bullet into the lands and fireforming the case back to chamber spec.
Might not ever happen with your Marlin but it's an issue for some. ~Muir

Thanks. This is exactly the sort of wisdom and knowledge that I am hunting for!

I do have another option which is to load jacketed pistol bullets at book loads/velocities. But amongst other things I am looking for something that is going to be really mild to shoot, and only needs to be accurate at 25 yards.

 

[dvbookshop]

Hi all,

I have Marlin 336 in 35 Remington and a ton of plated 357 pistol bullets. I'd like to find a load that duplicates 357 mag velocities without creating pressure spikes or anything else stupid.

Are there any good general principles to reducing published load data?

There are published loads for 158 grain pistol bullets, but I want to bring the MV down to below 1600 fps ideally (assuming that I treat plated bullets as requiring cast bullet velocities).

I was thinking of 18 grains of IMR4198.

Please feel free to point out any fallacies in my assumptions!

Thanks.

Trailboss powder might be the answer.

 

[LeftHandGuy]

Trailboss powder might be the answer.

Great call. If I can find any!