Rem. 700 .300 win. mag

[stevemiller]

Ok still trying to figure out this .300 win mag.getting a little here and a little there lol.now im loading 180 gr. sst my c.o.l to the lands in my rifle is 3.514
Hornady 9th calls for 3.340.I have read that the Rems like to be closer to the lands what should I do?Any advice will be appreciated.Also what are the lightest loads you would run in this?IE is 180 grain to light in anyones op?

[tgomez]

Just to let you know Remington doesn't cover your firearm under warranty if you use reloads in them. Just a heads up my friend! And 180 grain bullet from a 300 mag will drop take ANY animal on the planet.

[stevemiller]

Yes I appreciate that info,I realize that even if it were 130 grain it would drop anything but at this time i am more interested in accuracy.Some loads are to light and am looking for op's on the .300 win mag for accuracy. thanks

[Curly]

I load from 168 gr to 190 gr in my 300wm.  Also, I don't pay attention to the 3.34 oal......I load to get close to the lands and that may be  out to 3.60 or so.

[stevemiller]

Ok so Does it make any difference with the load to be out that far or is it Ok?Thanks Curly.

[stevemiller]

Also could this be why I just cant seem to get a very good group?

[Curly]

I have never worried about getting max velocities, only accuracy, so I haven't pushed it over the book max  but I suspect that I could use more powder and get more velocity. I never have had exessive pressure signs so I'm not sure how much over published data I could try before seeing pressure signs.  I almost always use slow powder like h1000.

[Karl Blanchard]

Back it off the lands .15" and try some out.  Every 30 cal I have ever loaded for has loved the 180's the most.  Thats from .308 up to 300 win mag and about every one in between. 

I always load up 5 light, medium, and higher powder charge rounds and test them out.  Usually you will have two on one end that shoots better.  From there, work up or down between the two until you settle on the optimal powder charge.  Then from there I will tweek seating depth to fine tune.  Thats how I work up a load.  I'm sure other guys have better methods but that is what has worked well for me.  Good luck

[Karl Blanchard]

I have never worried about getting max velocities, only accuracy, so I haven't pushed it over the book max  but I suspect that I could use more powder and get more velocity. I never have had exessive pressure signs so I'm not sure how much over published data I could try before seeing pressure signs.  I almost always use slow powder like h1000.

    I use imr4350 for everything 30 cal and I think as long as you stay within the book specs, you will be ok.  Manufacturers aren't gonna put out powder charges that aren't safe, too much liability.

[Curly]

Also could this be why I just cant seem to get a very good group?

You might want to try Sierra 180 gr if you are questioning the rifle's accuracy. The bullets are relatively inexpensive and you can almost always get a good group out of them.  Some bullet/powder combos certain rifles simply hate.

My rifle refused to group with RL19. I burned up almost a pound and it refused to group any load well. RL22 was pretty good and the highest velocities, but H1000 gave the best accuracy. Even though the velocity was a little slower with H1000, it became my go to powder with the 300 wm.

[stevemiller]

Its not grouping good at all,it is out .150,I am not concerned with the speed at this time.The powder is not a concern,The only concern in this post at this time is bullet weight and distance from lands.As i stated in the original post I read that rem. likes to be close to the lands,Now does anyone have any op on these 2 subjects?Thanks

[stevemiller]

I agree curly that is the bullet I am using 

[stevemiller]

Ok curly I have heard the same about H1000 I will try it with the 180 gr.,Now about the lands?

[stevemiller]

Back it off the lands .15 and try some out.  Every 30 cal I have ever loaded for has loved the 180's the most.  Thats from .308 up to 300 win mag and about every one in between. 

I always load up 5 light, medium, and higher powder charge rounds and test them out.  Usually you will have two on one end that shoots better.  From there, work up or down between the two until you settle on the optimal powder charge.  Then from there I will tweek seating depth to fine tune.  Thats how I work up a load.  I'm sure other guys have better methods but that is what has worked well for me.  Good luck

Ok so 180 is a good one,I use a lot of Imr I like it,I used IMR 7828 @ 70. grains with 180 sierra match kings.so i guess the only prob. would be the .150+ off the lands with the rem mag?BLRman what rifle were you using with .150 off the lands?

[BULLBLASTER]

Pick a middle powder charge and load groups of 3-5 rounds in differing oal. Maybe .05 shorter. So .05 off lands then .1 off lands then .15 and .2

  being longer than book saami max length will reduce pressure u til you hit the lands then pressure will spike when you contact lands.