all,
I just spent about 2 hours reading a lot of this forum in the hopes of seeing some recipes that would work for me. I've had moderate luck @ 1 MOA @ 100 yards but no consistency.
I am a total rookie to reloading. started this spring with the purchase of a 300 RUM. the cost of factory ammo @ $80/box was the driving factor. I'm reloading for $26/box.
Learning to reload on a 300 RUM has been interesting. also reloading 10mm.
Equipment:
rem 700 Long Range Stainless steel 26", 1-10" barrel, Terminator 2 muzzle brake
vortex viper hs-t 6-24x50
tally one piece rings
RCBS rock chucker supreme
neck size only die
200gr ELDX
Retumbo and H1000
CCI 250 primers
norma brass
all shooting from sand bags on a solid bench @ approx. 3,000'
I started out playing with powder charge only, retumbo, COL 3.600- i started at 90 gr and went up .5gr at a time looking for signs of pressure to get my max load. i went all the way to 95gr before i saw ejector pin marks. hornady max 93.6gr, nosler max 91.5gr, richard lee max 95.5gr. who do you trust?
I played with that for about 75 rounds getting nothing good only to find out my scope was moving... tally rings need to be lapped in! lapped the rings in, and i actually put down some form-a-gasket in the rings since i didnt have any sticky tape i hear some people use. scope hasnt moved since.
so starting all over with the recipe now... dam rings.... played with powder charge some more splitting the 1gr jumps into .5gr jumps all retumbo 90-95gr. i had some groups that put 2 @ .25" but the third would fly to 1-2" off the group.... second shot everytime. i never let my barrel get too hot so id spend 1 hour to shoot 12-16 shots @ 3 shots per recipe. Bought a trigger pull gauge, factory pull was 4.25lbs.... tore the gun down and adjusted the trigger down to 2.5lbs.
got tired of that not working and buried my head into reloading books and forums and found out i needed to find my lands and my jump. bought the COL gauge and modified case and found out these remingtons have super long throats... my lands are at 3.781" with the 200gr eld-x. no they are waaay too long to fit my mag well... guess i have a single shot rifle now... found out that i can get the first one in the mag with the tip reaching out into the loading ramp so 1 +1 now... i can live with that. it seemed crazy to redo my head spacing or modify my receiver and mag well to accommodate the longer loads. i really started logging all my variables now.
so i stared playing with seating depth. went with 3.770", 3.750", 3.730", and 3.710" 4 of each 91gr retumbo. this was done on some old brass i got from a friend. case says RP on it.
3.710"
[email protected]"
[email protected]"- one flyer
3.730"
[email protected]"
[email protected]"- one flyer
3.750"
[email protected]"
[email protected]"-gun hated that length
3.770"
[email protected]"
[email protected]"-sounds promising but not good enough
my buddy loves H1000 so i guess ill do the exact same test as above with that.
3.710"
[email protected]"
[email protected]"-one flyer
3.730"
[email protected]"
[email protected]"-gun hated that length
3.750"
[email protected]"
[email protected]"-one flyer... thought i had something there
3.770"
[email protected]"
[email protected]"-gun hated that length too....
so im heading into the backcountry on an elk hunt in two weeks at this point so i need to pick one and test powder charge! so i go out this morning, only change in variables is i changed from RP brass to Norma brass and its been hot all summer and this morning was 37F. powder temps were still room temp since they were in the house/truck unless they cooled down in the 45min to shoot 15 shots. i cleaned the barrel also after about 80 shots. i loaded up some fouling rounds with IMR7828SSC and sent 3 of those downrange before i started this test. i was gonna use that powder when i couldnt find retumbo or H1000 last spring...
so the exact load above, my choice of the best load ive seen, that shot 1.0" (91gr retumbo 3.710") was my choice for this years hunting season shoots groups below.
i finally borrowed a chrono just to see.
3.710"91gr
[email protected]"
[email protected]"2940-3050fps- what the hell? it shot 1.0" last week!
3.710" 92gr
[email protected]"
[email protected]" 3068-3119fps
3.710" 93gr
[email protected]"
[email protected]" 3187-3212fps
i cant be playing with a rifle that is so picky that temperature and brass will change from 1.0" 4 shot groups one week to 4.0" 4 shot groups the next....
i'm pretty much ready to put it away, grab the trusty old .270, get some shots in and take that into the backcountry next week... im out of time for this year...
any information for a rookie struggling with this would be greatly appreciated.
thanks,
Brandon