Any test load observations?

[tcoz]

Yesterday was the first time out with my 308 RPR. My objective was to test loads from 42.0 to 43.5 grains IMR-4064 in 0.5gr increments initially. The reason for the odd 42.8gr load is that a number of people state that it's the FGMM load. A lot of people also say that it's 43.5gr. In any case this is the range I want to work within. There were absolutely no pressure signs at any of these loads.

Can this be evaluated from an OCW or any other standpoint or is more data needed? My range time is extremely limited and I'd like to come up with an acceptable load from this session. I'm not looking for 0.25" groups either. I'm not a good enough shooter to take advantage of the "optimal" load so anything MOA or sub is fine with me.

Any helpful observations guys? Thanks in advance

Edit-- I forgot to mention that all rounds were loaded to 2.80 COAL as were all of the FGMM rounds that I checked. When I arrive at a load, I plan to fine tune it a bit playing with base to ogive length (0.01 to 0.03 jump) to see if it makes a difference in my rifle.

 

[Load Master]

Thanks for sharing your results. I enjoyed seeing them. From your targets and your 42.5gr level it looks like that fits into the results you are looking for.

Do you have a target example with the FGMM? Chronograph data would be interesting if you are trying to duplicate the FGMM.

 

[Ironicaintit]

Hard to argue with the results of the 42.5 load.

 

[dgod]

Good Info, Wish I knew which Bullet, Barrel Length, Twist to make a set of data I could refer to.

Dan

 

[Load Master]

Good Info, Wish I knew which Bullet, Barrel Length, Twist to make a set of data I could refer to.

Dan

On the targets it show SMK 168 gr.

 

[tcoz]

This is the only pic of the FGMM that I have and it was just to sight in my scope. The round on the lower right is from a different set/load/bullet. The FGMM shots are the one at the very top and the three in the orange.

I don't have a chronograph as I can't put anything in front of the line at the range and right now the MagnetoSpeed V3 is a little rich for my blood. I'll probably go with a MS Sporter sooner rather than later though.



I'm glad that a couple of you have said the 42.5gr load looks pretty good. That's my choice but I sometimes don't interpret these things like a lot of other more experienced people do.

 

[dgod]

Great Information, Thanks

Dan