6mm 105 Hornady BTHP--low impact bullet test

[T-Stick]

You are very generous however my 243 is a 1/9.25 twist so most VLDs above 90 grain won't stabilize. I'm guessing your above 100 grain bullets wont stabilize so I can't give them a fair test. The Hornady has a mild secant ogive and does stabilize. I'm thinking maybe I should try opening the hollow point more with a larger drill bit.

My top long range performer right now is the 90 grain ELDX but I'd like a heavier bullet and more BC.

 

[T-Stick]

I was using a .040 drill bit. I just ordered some .052 drill bits. I will try them to enlarge the hole and then retest.

 

[Gribley]

Would the DTAC nose ring cutter work on these bullets? I wonder if anyone has tried that. @Formidilosus ?

 

[Formidilosus]

Would the DTAC nose ring cutter work on these bullets? I wonder if anyone has tried that. @Formidilosus ?

Yes it would work.

 

[wind gypsy]

You are very generous however my 243 is a 1/9.25 twist so most VLDs above 90 grain won't stabilize. I'm guessing your above 100 grain bullets wont stabilize so I can't give them a fair test. The Hornady has a mild secant ogive and does stabilize. I'm thinking maybe I should try opening the hollow point more with a larger drill bit.

My top long range performer right now is the 90 grain ELDX but I'd like a heavier bullet and more BC.

How do you know that the bullet was stable at the lower MV you tested?

I dont think low MV testing for low impact velocity is always representative of reality because bullet stability and RPMS are significantly different.

 

[Gribley]

lol so the nose ring cutter is $575. I would need to shoot a lot of bullets to recoup that.

 

[beerbucksducks]

lol so the nose ring cutter is $575. I would need to shoot a lot of bullets to recoup that.

There was one for sale in the classifieds not too long ago.


Sent from my iPhone using Tapatalk

 

[T-Stick]

How do you know that the bullet was stable at the lower MV you tested?

I dont think low MV testing for low impact velocity is always representative of reality because bullet stability and RPMS are significantly different.

Your assumption is correct and therefore my data base only confirms tumbling when started at a low velocity and does not accurately represent extended ranges. I since found the bullet needs at least 2500 fps starting velocity to stabilize and needs yet more velocity for good accuracy. I also found that enlarging the HP with the next size up drill bit degraded accuracy. So the only thing I can do is test at extended ranges to get accurate results. I think this is due in part to having only a 1-9.25 twist.