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168's and LTR twist??????

 
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Old 12-19-2006, 09:18 PM
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Re: 168\'s and LTR twist??????

Well for one, over 2800 in a 26" barrel will start yeilding pressure problems. Also, the RPM's produced with a 12x at 2600-2800 are very user friendly with the 168 SMK's. In other words, those RPM's are good for a good stability factor so the bullet will go to sleep in a decent amount of time for optimum accuracy.
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Old 12-20-2006, 12:17 AM
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Re: 168\'s and LTR twist??????

[ QUOTE ]
The 178 AMAX has filled every one of my needs. It opens nice at low velocity, stays supersonic to 1K and is increadibly accurate. The 12 twist will still work fine for the 175 SMK and the 178. Not saying you should switch to them, just maybee give em a try.



[/ QUOTE ]

What's your recipe for the 178 A-Max. I would like to try them on my 308. Thanks
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Old 12-20-2006, 12:19 AM
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Re: 168\'s and LTR twist??????

Desert Fox,

What is your barrel length and twist? What kind of rifle?

I have several good loads for various barrels.
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Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.
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Old 12-20-2006, 02:25 PM
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Re: 168\'s and LTR twist??????

Michael,

My rifle wears the Pac-Nor Supermatch 3 grove ,12 twist, 25 inch barrel USMC Sniper rifle contour. Loves the Scenar 155 and the 168 Nosler J Comp but would like to try the 175's the 178's or the 190's for that matter. Just like to take shortcut here. I have on hand H4895,Varget, BLC-2 and IMR 4064 and 4350. Chamber were cut with Obermeyer designed reamer for 175 SMK. The Scenar with it's higher B.C is good for paper punching but I'm looking for a hunting loads that would streach this cartridge up to 800 yards on a deersize game.
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Old 12-20-2006, 02:59 PM
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Re: 168\'s and LTR twist??????

The 168 SMKs shoot great in my LTR (5 into .6" or less, average velocity 2653 fps)......the 175 SMKs shoot a bit better (best group so far was 5 into .288" average velocity 2576 fps).....using Varget powder for both bullets.
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Old 12-20-2006, 04:53 PM
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Re: 168\'s and LTR twist??????

Try VARGET and RL-15. Up to 45 grains each if this is a SAMMI chamber. As always, start lower and work up. I find that the 12 twist and the 178 make a great match with 42.0-45.0 of VARGET and RL-15. If your rifle is stupborn and you cant find a good load with VARGET, dont waste your time on anything other than RL-15. I would be supprised if VARGET didnt work well though. If it does, hold on! With a 25" barrel, you most likley will get somewhere between 2600-2700 FPS with the 178 and 45.0 of VARGET.

I have had great luck with the 190 SMK except for the lack of their expansion on game at 308 velocities, even at 300-400 yards. 600 wasent any better! 43.5 RL-15 was my pet load at 2657 FPS in an 11.25 twist 24"er. It was slightly on the warm side but shot amazingly well out to 1K. A 12x will be similar in load data.
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Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.
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  #14  
Old 12-20-2006, 07:01 PM
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Re: 168\'s and LTR twist??????

I used Varget for the 155 grain Scenar and BLC-2 for the 168 Nosler J4 Competition. The BLC-2 is really promising if not for temperature sensitivity issue.

Here's the ten shot group at 100 yards using the 168 Nosler Comp.Five round loaded with 43 grain and five with 43.5 grain of BLC-2. Federal Gold Medal Brass and 210M primers. Velocity at 2600-2675 fps respectively. As you can see, point of impact didn't changed much. This will be my summer load for this rifle. I can go up a grain for winter and push this bullet at 2700 plus without pressure problem.

[image]http://[/image]


Here's the 155 grain Scenar load. This will be my choice for my first high power competition.

[image]http://[/image]
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