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.

[Karl Blanchard]

Like I said in my previous post.  Seat them .15" off the lands.  Keep backing it off until you hit the sweet spot.

[stevemiller]

Like I said in my previous post.  Seat them .15" off the lands.  Keep backing it off until you hit the sweet spot.

how far off the lands do yours usually set? BLRman.

[stevemiller]

Like I said in my previous post.  Seat them .15" off the lands.  Keep backing it off until you hit the sweet spot.

I just went through and read all my post,I didnt say I was shooting the .300 with col at 3.340 I checked to see where the lands are and they are at 3.514 so my loads are .174 0ff the lands.Ok.Now my question is can this long of a distance from the lands cause bad groups?

[elkaholic123]

You guys need to know where to put the decimal point 

[stevemiller]

You guys need to know where to put the decimal point 

Do you think they mean .015 to the lands or what?

[BULLBLASTER]

You guys need to know where to put the decimal point 

oops. My bad. Please add a decimal place to my post on each number.
I knew what i was talking about... its not my fault people cant understand. 

[Karl Blanchard]

You guys need to know where to put the decimal point 

Hey your just lucky I used one!  I usually just say 15 off the lands.   

[stevemiller]

Ok now this thread just came together.BLRMAN you are saying .015 off the lands?Cause my .174 off the lands is huge right?

[Karl Blanchard]

It is a Ruger Mark II.  It shot fine at factory oal but liked to be long.

[stevemiller]

It is a Ruger Mark II.  It shot fine at factory oal but liked to be long.

Your cartridge liked to be long or the distance to the lands liked to be long?

[Karl Blanchard]

Ok now this thread just came together.BLRMAN you are saying .015 off the lands?Cause my .174 off the lands is huge right?

All depends on the load/gun combo.  I am working up a load in a .280 Rem and the winning combo was right at printed oal.  Trial and error and you will find it.  Seems like large for caliber bullets like 180 and up in the 30cal like to be seated long though for the most part.

[stevemiller]

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.

This answered it for me thank you curly. 

[stevemiller]

 


     Ill try this again.My lands are way of the factory c.o.l, .174 to be exact that is almost 3/16 of an inch.How much will this play in the accuracy of a Rem. mod. 700 .300 win mag rifle?

[Karl Blanchard]

The answer is, there is no right answer.  It could be the reason or powder choice could be the reason.  Or powder charge in relation to seating depth could be the issue.  Only way to find out is to experiment until you find the winning combo.

[Karl Blanchard]

I have several rifles that don't like to be close to the lands.  Just all depends on the combo

[hub]

I load 180 PT,s accubonds and SGK,s ..015 to .025 off the lands. I have a rem. 700 BDL.  I would say .174 is way too much jump and very well could cause bad accuracy. You would also be losing velocity as you increase bullet jump. The 3.340 is usually used for clip fed rifles which normally will not accept a longer length. My coal. is usually from 3.565 to 3.600 depending on the bullet. Loading down to 3.340 is usually a bad idea for top loading bolt actions. Also loading 180,s that short eats up powder space. Not good either.

[stevemiller]

Alright  ,Would age wear and tear extend this land out or is that just the way it was from the factory?

[Karl Blanchard]

One thing to watch though is if you load em long they may not fit in your box mag.  The load i have currently worked up for my 300wsm is too long for my box mag but shoots closer to quarter inch than half inch so she is getting upgraded to a Wyatt's box mag to allow for the long bullet.

[stevemiller]

One thing to watch though is if you load em long they may not fit in your box mag.  The load i have currently worked up for my 300wsm is too long for my box mag but shoots closer to quarter inch than half inch so she is getting upgraded to a Wyatt's box mag to allow for the long bullet.

This is good to know thanks.Now Im trying to figure if I should have this thing re chambered to ultra mag

[jasnt]

Personally I ignore the book aol. Let your rifle tell you where it likes it. I start at mag lenth or just under so it will feed properly. Then find optimum charge and then play with seating depth. I also found that most 300win mags I've loaded for like full power loads. They also don't seem too picky about seating depth,jme.
Ps book listed aol is just what depth they did their testing. Not where your rifle will want normally. .170 is quite a jump but I use a similar jump in my 300wm with vld's so it will feed out of my mag without troubles.