NdIndy
New member
Originally Posted By: BuckeyeSpecialwatch dog 80:
To answer your question: One poster here presented the acronym of MPBR but didn't explain its meaning = Maximum Point Blank Range.
That is MPBR is the range at which your bullet is no more than 2-3 inches above or below your crosshair, thus on a typical 270 such as yours sighted in to MPBR, the bullet will be almost on at 50 yards, 3 inches high at 100, 2 inches high at 200, and right on at say 250 and say 2-3 inches low at 300 yards ...[more or less].
This allows you to sight on a deer for instance and hit pretty much where you are sighting on the animal/target i.e. use the crosshair on the target, no need to hold high or low off the target. You just place the crosshairs on the animal anywhere from 0-300 yards and you will hit it.
Read up on MPBR in the loading manuals Exterior Ballistics section for various cartridges/animal sizes; it is a pretty effective and straightforward i.e. foolproof system, especially for big game hunting.
Close.
MPBR can be 2-3" for a 4-6" target. If your target is 18" you're looking at a 9" high/low range. The MPBR is the distance you can hold dead on without the bullet 'in theory' going above or below that target diameter. With a small target and rainbow gun that can be inside a 100 yards, with a large target and flat shooting caliber it can be 600 etc.
I shoot mpbr with all my hunting rifles. I haven't gone elk in quite a while but with the load I was shooting if memory serves, I was 4.7" high at 100 to give a 387 mpbr and ranging to 500 with minimal adjustment.
Using the identical load for goat the mpbr ranges in quite a bit since the target is only a 6" circle. The target size is a majority of what defines the end range.
AS for the OP, different calibers have different rules of thumb. 1" is really really generic and won't fit for a lot of calibers. Most modern high speed calibers won't drop a ton between 100 and 200 so it will more or less work for a lot.
To answer your question: One poster here presented the acronym of MPBR but didn't explain its meaning = Maximum Point Blank Range.
That is MPBR is the range at which your bullet is no more than 2-3 inches above or below your crosshair, thus on a typical 270 such as yours sighted in to MPBR, the bullet will be almost on at 50 yards, 3 inches high at 100, 2 inches high at 200, and right on at say 250 and say 2-3 inches low at 300 yards ...[more or less].
This allows you to sight on a deer for instance and hit pretty much where you are sighting on the animal/target i.e. use the crosshair on the target, no need to hold high or low off the target. You just place the crosshairs on the animal anywhere from 0-300 yards and you will hit it.
Read up on MPBR in the loading manuals Exterior Ballistics section for various cartridges/animal sizes; it is a pretty effective and straightforward i.e. foolproof system, especially for big game hunting.
Close.
MPBR can be 2-3" for a 4-6" target. If your target is 18" you're looking at a 9" high/low range. The MPBR is the distance you can hold dead on without the bullet 'in theory' going above or below that target diameter. With a small target and rainbow gun that can be inside a 100 yards, with a large target and flat shooting caliber it can be 600 etc.
I shoot mpbr with all my hunting rifles. I haven't gone elk in quite a while but with the load I was shooting if memory serves, I was 4.7" high at 100 to give a 387 mpbr and ranging to 500 with minimal adjustment.
Using the identical load for goat the mpbr ranges in quite a bit since the target is only a 6" circle. The target size is a majority of what defines the end range.
AS for the OP, different calibers have different rules of thumb. 1" is really really generic and won't fit for a lot of calibers. Most modern high speed calibers won't drop a ton between 100 and 200 so it will more or less work for a lot.