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300 Win Mag Lands are LONG....WHY....?

I've been loading my buddies savage stevens 200 .... 300 win mag with 150 gr interlocks at 3.340... like the book says is correct...but for kicks and giggles I checked the lands with the Franklin method and got 3.470... and 3.480 with the split case/bullet method... but both are really long...why? I know there is probably a lot of throat for longer bullets, but even a 230 gr bullet is suppose to be only seated around 3.395. I know that most will say that it's the measurement for fitting in the mag... but still... why is the throat so so so long. How can you ever get near the lands.... or are you not suppose to on a factory rifle?
 
lawyers lots of different bullets inexspensive rifle.
does it shoot well enough to hunt with with mag length ammo ?
if so do not worry about it.
 
In my opinion your friend Stevens 200 has a perfect amount of freebore for hunting and recreational shooting.

In reality your friends rifle has a shorter freebore than most 300winmags out there.
 
lawyers lots of different bullets inexspensive rifle.
does it shoot well enough to hunt with with mag length ammo ?
if so do not worry about it.


This. They know we know that to get the best accuracy we need to load long to get to the lands for best accuracy. Add that to the fact that many are not skilled enough to actually do it right and they will blow up a gun. Then add on the fact that these will not just accept the fact they are lucky to walk away, they need to get a lawyer involved to sue the company who did nothing wrong.

It took me getting into semi-auto rifles to learn many bullets will jump a very long distance and still shoot good.
 
Are you saying that they made it long so that we could not touch the lands and blow ourselves up?

If so, then that can't be right, because I tried some loads touching and even in ten thou... and I'm still here with all my fingers and toes...LOL.
 
I've been loading my buddies savage stevens 200 .... 300 win mag with 150 gr interlocks at 3.340... like the book says is correct...but for kicks and giggles I checked the lands with the Franklin method and got 3.470... and 3.480 with the split case/bullet method... but both are really long...why? I know there is probably a lot of throat for longer bullets, but even a 230 gr bullet is suppose to be only seated around 3.395. I know that most will say that it's the measurement for fitting in the mag... but still... why is the throat so so so long. How can you ever get near the lands.... or are you not suppose to on a factory rifle?
There are bullets that are close to .308 but a few thousands greater in diameter. In the event one of these larger bullets were loaded in error plus a possible substitute quantity of 3031 instead of 4831 along with the bullet heavily jammed you would now have a load I wouldn't want to shoot without all that freebore and even then I wouldn't want to shoot it because of the extreme pressure. Anything close to losing your vision is to close !
 
550px-300WinchesterMagnum02.png



this image says its the bullet tip...
 
daniel brothers said:
but even a 230 gr bullet is suppose to be only seated around 3.395.

For basic reloading maybe. Many of us like to sit the bullet as far out as possible or as far as magazine allows so we can fit more slower burning powder and get better velocities.

SAAMI is important for a "reloader" once you become a more experience "Hand Loader", competitive shooter, performance and accuracy driven, you will worry more about your personal measurements.

It's like any hobby, some tinker with cars and run to the gas station, others tinker with stuff that needs race fuel. I consider many on this site race fuel hobbyists.

My factory Rem Sendero 300 Win for comparison ran a 165 NBT at 3.560" 12 thou off with more powder, speed and accuracy than I could ever achieve with 3.340"
 
daniel brothers said:
but even a 230 gr bullet is suppose to be only seated around 3.395.



SAAMI is important for a "reloader" once you become a more experience "Hand Loader", competitive shooter, performance and accuracy driven, you will worry more about your personal measurements.

It's like any hobby, some tinker with cars and run to the gas station, others tinker with stuff that needs race fuel. I consider many on this site race fuel hobbyists.

My factory Rem Sendero 300 Win for comparison ran a 165 NBT at 3.560" 12 thou off with more powder, speed and accuracy than I could ever achieve with 3.340"
I just loaded some Barnes TTSX 180 gr and Hornady SST 180 grain, both were 3.495 and it wasn't till I got the exact powder charge that my groups were .5 moa. They were all over the place till that last batch. I think the harmonics of the barrel play a huge part as well.
 
I just loaded some Barnes TTSX 180 gr and Hornady SST 180 grain, both were 3.495 and it wasn't till I got the exact powder charge that my groups were .5 moa. They were all over the place till that last batch. I think the harmonics of the barrel play a huge part as well.
Hence the phrase" work up a load. I was running too hot. Winchester Model 70 super grade. Longer barrel gets more velocity and I didn't need a heavier charge
 
Are you saying that they made it long so that we could not touch the lands and blow ourselves up?

If so, then that can't be right, because I tried some loads touching and even in ten thou... and I'm still here with all my fingers and toes...LOL.
Thread necromancy is fun!

It's probably the other function issues, like jamming a bullet into the lands and then pulling the bullet when you open the bolt, not merely fear of overpressure near the lands, that drive a long freebore.

FYI, you can get the SAAMI specs online (and the CIP specs, those are even easier), and compare to your rifle.
 
SAAMI and manuals simply state the max length of factory ammo that fits inside of the ammo box. The box length is determinedly by the saami specd oal.
Forget every bit of that and seat the bullet at full jam length, and starting load data. The go from there with tuning. Most guns shoot best in a fairly small range between full jam and about .010 off.
The reason I start at full jam is because it only leaves one way to go with bullet seating.
If the ammo must feed from a magazine, that is your max length. If not, it's up to you to find where it shoots best and to responsibly work up loads in regard to pressures. If you don't fully understand this, it's best and safest to just follow the published saami data in Reloading manuals.
As was previously alluded to, there is Reloading and there is hanloading. They are not the same. Reloading instructions are clearly printed in manuals. Handloading
to suit individual guns, is not.
This site is generally one related to accuracy, which is strongly correlated with handloading ammo tailored to individual firearms.
 
SAAMI and manuals simply state the max length of factory ammo that fits inside of the ammo box. The box length is determinedly by the saami specd oal.
Not true!

The SAAMI specs (and CIP specs) include a chamber drawing, with a freebore indicated on said drawing (it's old, weird and sloppy for the .300Win Mag).
 

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