I am a hardcore Nosler BT believer but my father doesnt like the concept of ballistic tips he believes if they hit brush they will be thrown off worse than a soft point? Is this true? i have never heard anyone say how a BT does when it may contact a little bit of brush? Will they expand prematurely? Or do they perform like a normal soft point when they contact brush?

From published tests and what I have found in non scienctific tests .
NO bullet will punch thru brush and not deflect ,not even 12 gau slugs.

IMO the BT are no worse and maybe a little bettter than a soft point in not deflecting on brush.
The soft point has more nose area to impact a branch and dig in compaired to the sharp point of a BT.

If you hit a branch or heavy weeds any bullet will deflect regardless !

YES!

A bullet that is slipstream designed to buck wind will probably be a bit less effected by brush as well.

It will probably vary. I've heard of soft point bullets fragenting and/or mushrooming when hitting brush giving poor performance when hitting an animal. Best bet is to not shoot through brush with any bullet.

I have never had any luck shooting though brush with the exception of a Winchester Power Point soft point 180 out of a 30-06..but this was at a range of bout 15 yards. No bullet is gonna do anything predictable in brush. Without a doubt a heavier bullet will be better but its not a shot ya wanna make a habit of.

Not necessarily.A test published a few years ago had a 250gr -.338 bullet do the best but a 50gr -.223 bullet actually did better than many much heavier bullets.

I am guilty of brush bustin. With success. But I try never to do it. I usually use a slug gun. What I noticed on my own tests with a bunch of brush and a target 10ft back, is the bullet can keyhole or tumble. So if you have a bT or a softpoint probably won't matter. Its going to make the bullet unstable. If you ever shot an arrow at a buck, and hit a little twig, you see what happens. I have had arrows shoot 20 degrees or more out of line of shot with little twigs I couldn't see in the early season.

yeah with brush busting your best bet is deffinately a slug, A friend and I tested several calibers the same way as bigcountry did, even tested two of the quote best brush busting calibers 44 mag and 375 winchester both with poor results, had the best results with wolf 200 grain SP 7.62x54R out of a mosin nagant and winchester 64 grain power points in .223 rem out of a mini-14. and the best results with 12 ga. 1 oz rifled slugs.

Quite a few years ago I believe Jim Carmicheal did a test to see if big slow,heavy bullets or fast,boatailed bullets would shoot through brush. he made a box that held wooden dowels to shoot through. The end result was that there was no bullet any better than the other and that included 12 ga slugs. All bullets were deflected. The further in front of the target the brush, the further the bullet was off the target. I believe he recomended if the brush was more than 2 ft in front of the target you stood a good chance of wounding or missing a deer completely. With the brush 1 ft away most of the time you would stay in the kill zone.

That is the test I refered to .
If I remember right the winner for best results was the 223 with a 55gr FMJ.
Not a hunting bullet.
I saw a nice buck shot in the ass by a guy shooting a 12 gau slug ,he hit a 1/2 diamiter branch 10'-12' from the deer .
It took us 2 miles and 8 hrs to recover that deer.

THere is NO bullet out there that will give CONSISTANT results through brush, impact will vary every time so there is absolutely no way to compensate or justify for a shot through brush.