Equipment & Gear > Guns and Ammo
never had this before
Oh Mah:
For the first time with new brass i had to chase down a major problem.A heads up for reloaders.I have been reading some threads on here about case volume problems lately and have come to another problem because of it.I have been loading 81grains of H100 powder in my .300 win mag for over a year now,It is a very good load.Tack driver if you will.3100 fps.Now all of a sudden im chasing c.o.a.l all over the place and when checking with the gauge im .025-.035 long on datum line.
The max load now all of a sudden is swelling the case at the datum making it to long to chamber.
Now i will have to extend the c.o.a.l out closer to the lands hoping to keep accuracy and speed so i dont have to order a new dial for my scope.
What have i learned from this?DON'T PUSH THE LIMITS OF YOUR CASE CAPACITY LOL.YOU MIGHT HAVE TO START OVER. :tup:
b23:
What bullet is this 81gr of H1000 with???
Oh Mah:
.300 win mag nosler 180 b/t
b23:
Depending on your OAL, 81gr of H1000 with that bullet is a very compressed load and it's very possible the actual powder itself is what is messing with your OAL. Are you using a drop tube? If not and you plan on staying with that particular load a drop tube could help.
Have you tried any H4831sc or RL26? RL26 will probably gain you 75-100fps over your current load and it'll be right around that 98-99% fill capacity instead of the 110% you're at now. Maybe worth trying.
Oh Mah:
Thanks but i took all of the problem loads apart,Resized them all again and measured my chamber.I moved the Coal out to half way between.3.450 instead of 3.340.Chamber measured 3.520.This will give the load more room and wont cause the bullet to compress the powder.All of what you said is what i came to also.The brass volume is to small for the max load with the coal set at recommended lengths. :tup: This is all do to needing to buy new brass as the brass i was using has been used enough lol.
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