35WhelenAI
WKR
- Joined
- Nov 20, 2021
- Messages
- 1,740
With my Leupold VX3HD 3-9 CDS, it's zeroed at 100 yds, then can be dialed up as/if needed. However, I'm an MPBR user by habit so I can dial it up to 3" high at 100 yds and leave it.
In any case, 500 yds with a 180 gr TTSX at 8000' elevation is still moving at ~2250 fps, at 6000' elevation it's ~2200 fps. That gives 700 fps above their threshold if published velocities for the 180 gr TTSX factory load are achieved.
However, just drop down to the 168 TTSX gain velocity (bullet is essentially identical in BC to the 180 TTSX) and never look back. 175 LRX is an option, but has same expansion velocity as the 168 TTSX and not enough BC advantage to make up for the lower initial velocity.
Here's a table I found on another forum from Barnes with minimum expansion velocities.
Keep in mind, and before it gets brought up, that is typically for the tip to peel back, not full expansion. However, with 700 fps to spare based on what you've said, from my experience it's a non-issue for proper expansion at the ranges (impact velocities) you will engage game.
In any case, 500 yds with a 180 gr TTSX at 8000' elevation is still moving at ~2250 fps, at 6000' elevation it's ~2200 fps. That gives 700 fps above their threshold if published velocities for the 180 gr TTSX factory load are achieved.
However, just drop down to the 168 TTSX gain velocity (bullet is essentially identical in BC to the 180 TTSX) and never look back. 175 LRX is an option, but has same expansion velocity as the 168 TTSX and not enough BC advantage to make up for the lower initial velocity.
Here's a table I found on another forum from Barnes with minimum expansion velocities.
Keep in mind, and before it gets brought up, that is typically for the tip to peel back, not full expansion. However, with 700 fps to spare based on what you've said, from my experience it's a non-issue for proper expansion at the ranges (impact velocities) you will engage game.
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