Bullet Drop....... - The HuntingPA.com Outdoor Community
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post #1 of 19 (permalink) Old 12-01-2010, 02:16 PM Thread Starter
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Bullet Drop.......

Last year I sighted in my 30-06 rifle with 180gr Remington Core Locks at 100 yards and had good groups. A couple of weeks ago while shooting I shot 150gr Remington Core Locks at 100 yards and the area on the target I was hitting was atleat 12" below the bullseye. My question is, would 150gr bullets drop that much at 100 yards compared to 180gr?.......
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post #2 of 19 (permalink) Old 12-01-2010, 02:39 PM
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Re: Bullet Drop.......

It's not that the 150 is dropping more, it's that it's not rising as much as the 180. The 180 is harder recoiling and slower moving, this means the barrel rises more before the bullet leaves it.

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post #3 of 19 (permalink) Old 12-01-2010, 03:08 PM
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Re: Bullet Drop.......

The difference in Muzzle velocity between the 150gr. and the 180gr. is only 200fps. I doubt if that's why your getting a 12" drop at 100 yards between bullets.

Tell me, this year when you are shooting the 150gr. core-locks, are you also shooting any 180gr. core-locks to see where they are coming in at?

Sw
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post #4 of 19 (permalink) Old 12-01-2010, 03:21 PM
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Re: Bullet Drop.......

Rifle barrels handle different bullets and different loads differently. You can't expect two different loadings to shoot the same POI, it's just the way it is. Sometimes you get lucky and they will shoot close to each other, but you can't expect it. Sight in with the cartridge you plan to hunt with and stick with it.

Alrighty then!
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post #5 of 19 (permalink) Old 12-02-2010, 09:22 AM
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Re: Bullet Drop.......

Quote:
Originally Posted by tundragriz
It's not that the 150 is dropping more, it's that it's not rising as much as the 180. The 180 is harder recoiling and slower moving, this means the barrel rises more before the bullet leaves it.
tundragriz is spot on.

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post #6 of 19 (permalink) Old 12-02-2010, 09:41 AM
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Re: Bullet Drop.......

Quote:
Originally Posted by tundragriz
The 180 is harder recoiling and slower moving, this means the barrel rises more before the bullet leaves it.
I agree with this to a certain extent...But to make a 12" difference?....C'mon!.....This rifle just happens to throw the 150gr. bullet at a different spot, unrelated to "drop", or recoil.Some rifles will throw a different bullet to the side, some higher, some lower...This particular rifle throws them low...Real low.
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post #7 of 19 (permalink) Old 12-02-2010, 09:45 AM
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Re: Bullet Drop.......

Quote:
Originally Posted by Big Ken
Quote:
Originally Posted by tundragriz
The 180 is harder recoiling and slower moving, this means the barrel rises more before the bullet leaves it.
I agree with this to a certain extent...But to make a 12" difference?....C'mon!.....This rifle just happens to throw the 150gr. bullet at a different spot, unrelated to "drop", or recoil.Some rifles will throw a different bullet to the side, some higher, some lower...This particular rifle throws them low...Real low.
I was just thinking the same thing while I was outside getting some air. 12" does seem a bit much after thinking about it for a moment.

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post #8 of 19 (permalink) Old 12-02-2010, 10:14 AM
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Re: Bullet Drop.......

If your muzzle is moving that much under recoil then its Red Ryder time

A 12 inch difference means that his rifle shoots those bullets lower.

The daughters 30-30 with the reduced load I worked up for her, will throw 2 separate groups 6 inches apart, with everything the same except primers. If you are zeroed with Winchester, Remington will hit low and a little left by about 6 inches. Rifles are finicky critters. They like to eat what they like to eat.

Every day you see it on the news. Another felons life needlessly spared by inaccurate fire.

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post #9 of 19 (permalink) Old 12-02-2010, 12:21 PM Thread Starter
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Re: Bullet Drop.......

Quote:
Originally Posted by Sethwood
The difference in Muzzle velocity between the 150gr. and the 180gr. is only 200fps. I doubt if that's why your getting a 12" drop at 100 yards between bullets.

Tell me, this year when you are shooting the 150gr. core-locks, are you also shooting any 180gr. core-locks to see where they are coming in at?

Sw
Nope, the 150's were all I had on me at the time. I am going to use a bore sighter to atleast see if my scope is off then I'll go from there. I know this is all "Last Minute" but I have been super busy, hopefully Ill head out to my buddies range tomorrow.......
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post #10 of 19 (permalink) Old 12-02-2010, 12:31 PM
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Re: Bullet Drop.......

I shoot 150 gr winchester ballistic tips 1 " high at a hundred and they group a pattern that I can cover with a nickel. If I shoot my bench loaded 150 gr nosler ballistic tips they will group 1/2 high and 2 inches left and I can still cover them with a nickel. Same grain same gun completely differnt pattern. I am not suprised by what you found with 30 grain difference in bullet choice.
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