I've been loading lead bevel base 9's and am thinking about ordering some flat base. The bevel base appears to be easier to insert. Some bullet manufacturers offer some 9's in bevel base only and other bullets in flat base only. Why the difference?
Bevel base vs. Flat base
- Thread starter nevadabob
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GP100man
Member
The bevel based boolits are easier to cast in an automatic machine.
But in my revolvers when I push em I find the flat based to perform a notch better .
My 45acp doesn't care as pressures are a bit lower than a 357/44 mag.
As a boolit caster my self the bevel based will gather lobe on the bevel in Lyman type lobe sizers but the Star machine (nose first)sizer it won`t.
If the ammo is loaded & stored for some period of time the loobe on the base it could cause probems such as rendering the powder inert to some degree causing squibs .
There`s been several discussions on this subject over on CastBoolits.com.
GP
But in my revolvers when I push em I find the flat based to perform a notch better .
My 45acp doesn't care as pressures are a bit lower than a 357/44 mag.
As a boolit caster my self the bevel based will gather lobe on the bevel in Lyman type lobe sizers but the Star machine (nose first)sizer it won`t.
If the ammo is loaded & stored for some period of time the loobe on the base it could cause probems such as rendering the powder inert to some degree causing squibs .
There`s been several discussions on this subject over on CastBoolits.com.
GP
blarby
Member
If you aren't having any of the complications commonly associated with bevel based bullets, is there something about the flat based bullets that would cause you to chose them over a proven design/load ?
If it ain't broken......
If it ain't broken......
Based on nothing more than my own preferences, I'll take the flat base every time. I think the only advantage for a BB, other than ease of loading, is they are easier to cast in automated machines. My feeling, and again, it is only my personal bias, is that I would rather my powder work against the full diameter of the bullet's base. Call me nuts, but I have found more uniform velocities and better accuracy from my 9, 38, 357, 44, 45, and 30 cal flat based bullets. (I am also partial to traditional swc designs and probably 75 per cent of my forty or so handgun moulds are such).
blarby
Member
Then by all means, try them. I was just curious.
Whats the bullet ?
Whats the bullet ?
blarby
Member
A great bullet.
Make sure and give yourself sone extra case flare when seating, compared to what you are used to.
Make sure and give yourself sone extra case flare when seating, compared to what you are used to.
Mad Chemist
Member
My 9x19 load volume is too high to mess around with flat based lead. Loading flat base is slow. I'll only put up with it for revolvers. I don't see any reason for these bullet designs in 9x19. JMO
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