Plastic Tips , melt at LR

[ChrisF]

Go to Hornady . com , for their News , found when using doppler radar , that the BC was changing big time at a certain LR distance , basically found out that after a point the plastic tip had heated up and melted , they make no mention of their Amax line ?

This was found while doing testing on a hunting version of the Amax type bullets .

 

In the new bullets they use a heat proof plastic .

[gbal]

"My bullets melted" - may just be a very good excuse.... To expand on Chris's post:

In developing new high BC bullets,using Doppler radar CdvMach graphs,Hornady found that for high BC (roughly above .55) there was noticeable drop off in that BC,attributable to increasing drag from deforming (melting) polycarbonate tips (for all makes of tip).Varmint bullets to 400 yards are affected only slightly but as range extends, high retained velocity heat deformation gets considerable:

eg 6.5 140 Amax with starter BC .585 is down to .545 at 800y.

 

Of course,Hornady would not be saying all this if they didn't have a solution-their Heat Shield Tips-which improve the BC in the above 6.5 140 to .610 at 800.

 

These bullets are secant,Extremely Low Drag: ELD X for hunting, ELD M for target.

 

"My bullet melted".....well,there is a solution,if you have this problem (though you probably don't know...). :-)

 

gbal

[ejg223]

never thought of that, PC has quite a high melting point as it is.

I could injection mould ceramic tips that would only melt above 2000 C.

edi

[Hatzi]

If only they could develop a way to make 17HMR reliable and consistent, a problem that people actually have, rather than one that never seemed to be bothering anyone.

[meles meles]

If only they could develop a way to make 17HMR reliable and consistent, a problem that people actually have, rather than one that never seemed to be bothering anyone.

 

 

It's called .22WMR isn't it ?