Imr 4955 in 6mm creed?

[Creedmoor shooter]

Any one try 4955 in your 6mm creeds? If so what kind of velocities are you seeing? I found a bunch locally and im in a bit of a bind for powder.

 

[Shortmagman]

Should work. Hogdon's manual gives load data. It is not the tops for velocity nor is it the slowest. I have found it to work in other calibers where H4831 is used.

 

[Creedmoor shooter]

Should work. Hogdon's manual gives load data. It is not the tops for velocity nor is it the slowest. I have found it to work in other calibers where H4831 is used.

Not necessarily looking for top velocity. This is my competition rifle so im just looking to get a 110 at 3000-3050 fps with consistency

 

[Shortmagman]

I have not used it in 6mm CM. I am using RL-16 and Staball. RL-16 has worked well with 100 gr..Staball is off the charts with velocity but not as consistent. You can wait for someone that has shot it or try it yourself. I think if i were you i would give it a try.

 

[Creedmoor shooter]

Normally I use rl-16. Unfortunately its non existent. Ive tried rl-23 and that works but I can't find that either. I'm going to go ahead and give it a go.

 

[Calvin45]

4955 certainly is appropriate burn rate for heavies in this cartridge.

burns clean, is temp stable, cfe...should be great.

I will offer one word of caution: in my very very limited, take it for whatever you think it's worth, experience, it's wierdly "spiky" as you approach and exceed max pressure. Went from no pressure signs to a stiff bolt in one grain of difference, and did this consistently in my .300 win and 270 win. And I might not of said anything except another member here had the same thing happen. Haven't seen this in any of the other enduron powders. I think it'll be great, just keep an eye on pressure signs and move up even slower than normal is my advice.

 

[Creedmoor shooter]

Thanks for the info. This is my first time with enduron powders. The plan is to run the 109 hybrid or the 110 smk. I also grabbed a pound of hodgdon hybrid 100v to try.

 

[doverpack12]

I hit very high pressure and blew primers using Hodgdon start loads in 243 with 90 gr TGK.
went to something different after that and haven't found another use for my pound yet

 

[Capt RB]

4955 is super accurate but I dropped 2 primers in a row 1.5 grains below max. I have not used it since. If I start shooting the 243 again I will revisit this powder because I have 10#s of it.

 

[Creedmoor shooter]

Dang guess ill proceed with caution!

 

[Varmint Hunter]

Interesting comments regarding pressure and 4955. I blew a primer, damaged the bolt nose, and destroyed the extractor on a 22-243. Admittedly, I was working in uncharted waters at the time so I didn't think much of it.
I ended up with an aftermarket bolt and avoided the 4955 for further load development. I guess that was a good call.

 

[Creedmoor shooter]

I guess I should have made this thread alittle sooner. Glad I only bought 1 lb

 

[Calvin45]

Interesting comments regarding pressure and 4955. I blew a primer, damaged the bolt nose, and destroyed the extractor on a 22-243. Admittedly, I was working in uncharted waters at the time so I didn't think much of it.
I ended up with an aftermarket bolt and avoided the 4955 for further load development. I guess that was a good call.

See this is what I'm talking about! It ain't just me... I was fiddling with it in a 300 win mag that loved 4831 and 208 hornadys. Tried the 4955 at starting book load...fine...up a grain...no signs...and so on, no signs, very slow rise in muzzle velocity, until all of a sudden it's primer blown out the back and need a mallet to open the bolt.

 

[Varmint Hunter]

See this is what I'm talking about! It ain't just me... I was fiddling with it in a 300 win mag that loved 4831 and 208 hornadys. Tried the 4955 at starting book load...fine...up a grain...no signs...and so on, no signs, very slow rise in muzzle velocity, until all of a sudden it's primer blown out the back and need a mallet to open the bolt.

For me it was a bit different. There was no load data for the 22-243 or the (then new) 4955. I extrapolated my data based on perceived burn rate and started low but my next step or two up resulted in the most dramatic mis-happening that I've personally experience in 40yrs of reloading. It was an awakening.