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30 cal Hornady SST

 
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  #1  
Old 04-05-2003, 01:50 PM
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30 cal Hornady SST

I received a box of 180 grn SST bullets from a friend. I noticed that they have a cannelure on them. Do I have to seat the bullet to crimp right on the cannelure or can I seat it as needed. Also do the cannelures pose any problem with accuracy if not seated to them. PS I am shooting a 300 win mag.
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  #2  
Old 04-05-2003, 02:18 PM
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Re: 30 cal Hornady SST

samson, Just seat them as needed, the cannelure shouldn't affect accuracy, at least not from I've seen when shooting with them. Jay [img]images/icons/wink.gif[/img]
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  #3  
Old 04-07-2003, 08:40 PM
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Re: 30 cal Hornady SST

The 165 30 cal SST are the most accurate hunting bullet I have ever used, equal to match bullet. The canneleur will not affect accuracy and does not need to be seated to this level.

Jerry
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  #4  
Old 04-07-2003, 10:37 PM
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Re: 30 cal Hornady SST

180 SST in my 300 Win mag. Six shots in one hole. Just tutching the lands.
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  #5  
Old 04-16-2003, 07:39 AM
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Re: 30 cal Hornady SST

Your mileage may vary. Seated magazine length in a SS M 70 300 RUM, the 165 SSTs shot poor. What I found that worked in this particular rifle was Sierra 164 HP Game Kings. It's ogive design got the bullet closer to the lands - less jump. Which is what this rifle needed.

Robert A. Rinker states in his book "Understanding Firearm Ballistics" in Chapter 16, Bullet Design & Performance, page 213 Notes On Bullets:

"Bullets with grooves crimped around their body have lower accuracy because the bullet is deformed in an area that disrupts the flow of air and disturbs the aerodynamic stability. Even if the groove is perfectly even and uniform around its full length, which it rarely will be, it will still lower accuracy. It will also reduce the life of the case from over-working the metal. This can cause splits at the mouth that are unnecessary. Factory ammo... ."

From my experience, I will not disagree with Rinker.
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  #6  
Old 04-16-2003, 03:21 PM
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Re: 30 cal Hornady SST

Sorry to disagree with Mr. Rinker but the new SST's are match accurate. They will shoot in the 1's & 2's. The Interlocks are also capable of sub 1/2 MOA accuracy. Both of these have cannelures.

If mag length limits getting the ogive close to the lands, go to a lighter SST. The SST are very long for their weight and can cause issues with ogive/rifle land distances. That long length means that they have a very high BC and fly very flat.

The bullets do not need to be seated so that the case mouth is in the cannelure. In this redesign, the cannelure acts more to limit bullet expansion then for crimping.

Jerry
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  #7  
Old 04-16-2003, 04:24 PM
dwm dwm is offline
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Re: 30 cal Hornady SST

I have been patiently waiting for this subject to come up. I have not been overly successful with the Hornady SSTs.

I have had good results with the Hornady AMAX, Nosler BT and Partitions.

This gives me some incentive to see if I can do better with the SSTs.

Thanks,

Doug
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