IMR4895 for 32cal 170gr GC

[Marvin S]

I can find data for H4895 but not IMR4895. Anyone have data for the 170gr GC in a 32-40. Thanks. The IMR web site shows nothing for 4895.

[StarMetal]

I can find data for H4895 but not IMR4895. Anyone have data for the 170gr GC in a 32-40. Thanks. The IMR web site shows nothing for 4895.

According to Hodgdon their 4895 should be slightly faster. My own testing with H4895, IMR4895, Accurate 2495, and surplus 4895 in my 32 Special I found the same charge with each of those powders to be within 7 fps of one another. Just interpolate you load for IMR4895. Choose the lowest loading and work up.

Joe

[Marvin S]

LEE load data shows 22.0 Gr of H4895 as a start and a do not exceed load. I have IMR4895 but not H4895. What is the deal with a start and dont exceed at the same weight. The only thing I can think of is anything lighter might produce hang fires and anything more is to much. This is for a new Winchester Hi-Wall.

[StarMetal]

LEE load data shows 22.0 Gr of H4895 as a start and a do not exceed load. I have IMR4895 but not H4895. What is the deal with a start and dont exceed at the same weight. The only thing I can think of is anything lighter might produce hang fires and anything more is to much. This is for a new Winchester Hi-Wall.

On their own burn rate chart http://hodgdon.com/burn-rate.html
Hodgdon shows their 4895 as faster.

I don't know what Lee it talking about.

Joe

[Marvin S]

So do you think I would be safe to use the IMR in direct replacement for the Hodgen powder in this case?

[StarMetal]

So do you think I would be safe to use the IMR in direct replacement for the Hodgen powder in this case?

Yeah I do. What was interesting about the test I mentioned were the different brand powder threw about the same weight on the scale without changing the measure setting. IMR is a tad slower then the Hodgdon flavor. My charges in my 32 Special were 28 grains. Not hot by any means. You can also look at jacketed data and get an idea too of your load....that's just look and compare, not use jacketed data.

4895 of any brand isn't one of those powder that has problems with reduced load...like say 4831. You could knock your load down two grains if you want to make you feel safer.
Joe

[Marvin S]

I sent a couple hours last night looking at loads for the 30-30 30/06 and such, comparing these two powders and found that they could be identical in some loads and go higher or lower in others. Thats when I got to scratching my head. Thanks for the advice StarMetal.

[StarMetal]

I sent a couple hours last night looking at loads for the 30-30 30/06 and such, comparing these two powders and found that they could be identical in some loads and go higher or lower in others. Thats when I got to scratching my head. Thanks for the advice StarMetal.

That's how you learn new things, doing the comparing like you mentioned. Let me know how the load works out so we both can compare the two powder in that round of yours. You're welcome for what little help I gave you.

Joe

[Marvin S]

www.exteriorballistics.com/reloadbasics/burnrates.cfm. This appears to be the Sierra loading manual. They claim that the two powders are interchangeable. Interesting.

[shotman]

Correct me If I am wrong . But didnt 4895 have a problem if used as a compressed charge. I remember something about the use of a 250gr 30cal bullet and that powder as a compressed load

[StarMetal]

Correct me If I am wrong . But didnt 4895 have a problem if used as a compressed charge. I remember something about the use of a 250gr 30cal bullet and that powder as a compressed load

Hodgdon online data has lots of compressed loads using 4895 in various calibers. One is a 200 gr bullet in a 308.

Joe