Ballistic Tip OverviewBallistic Tips (BT's) were designed by Nosler for violent expansion / explosion and medium penetration on light skin type animals like deer.
For most calibers shooting fragile BT's, you're better off using
heavier projectiles with bigger Sectional Density's (SD's) than you would normally use for a regularly constructed bullet.
Why?
1. Heavier bullets for caliber are better in a BT because they tone down the violent expansion a bit and still have enough weight leftover for a complete pass-through.
2. The shock-value with the heavier BT will still be more than lighter
standard bullets and you get more energy on target.
3. Short range shots also suit the larger round with a higher SD versus lighter weight BT'd bullets with less mass.
4. Raking quartering-away shots obviously benefit from a
heavier round for adequate penetration.
5. A larger BT'd bullet is also more forgiving if you shoot accidently into the shoulder.
Example:
.270 Win BT's benefit from 150-gr. versus 130-gr.
30-06 BT's perform better with 180-gr. versus 150-gr.
FYI:
Nosler says that beginning with the 30 caliber 180-gr. Ballistic Tips (and larger), the jacket's profile is changed or upgraded to a much stronger contour similar to the AccuBond (shown below). The lead core is also hardened over the 165-gr. and below bullets.
Lighter weight bullets like 165-gr. 30 caliber and lower (shown below) do not have the thicker contour which starts in the middle of the shell and goes down to the base.
In summary, one might suggest that the 180-gr. Ballistic Tip is simply a non-bonded AccuBond.
Caution:
* Standard bullets generally perform better on deer in lighter to mid-weight sizes.
* Ballistic Tipped rounds are the
exception to the rule as outlined in the opening post. Reported problems of a BT blowing up too quickly are generally associated with too light of a bullet.
Steve
P.S.
I like a bullet to perform two things in my 30-06:
1. Violent expansion / shock.
2. Plenty of penetration for a pass-through.
Nosler makes 4 great rounds to accomplish any North American task - listed in order of toughness:
1. Ballistic Tip
2. Solid Base
3. AccuBond
4. Partition
* Light skinned / boned deer: 180-gr. Ballistic Tip / Solid Base / AccuBond
* Heavy skinned / boned elk: 180-gr. Partition / AccuBond