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Post by grouse on Apr 12, 2009 11:15:42 GMT -5
I went to the range yesterday to really start testing the 200grn Lehighs with Polymer tips on them. Right away i realized the bullet was to long to stabilize in a 1/30 twist barrel. I was shooting my 45caliber Disc Elite. The accuracy was horrible. After talking with Dave we will need to shorten the bullet for the guy's that want the extra BC. That will probably mean lighter as well.
So when all failed i decided to run some BC'S for the T/C Shockwave and the 200grn Lehigh Hollow point. Here are the numbers i got.
Lehigh 200grn
Actual BC 0.157 (The website lists it at 0.158 so your actuals validate this)
Drop - 0"(100yd), -8.7"(200), -34.3"(300)
T/C ShockWave 200grn
Actual BC 0.195
Drop - 0"(100), -7.7"(200), -29.2"(300)
The more i look at this, the bullets are with in 1" at 200yds. Wow, i wont be needing a tip that's for sure. But those that need them, we will be working on them very soon.
All shots were with 130grns of BH209 and Federal 209A Primers. Avg MV was 2350
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Post by bluedog on Apr 12, 2009 12:24:06 GMT -5
Grouse,
What is your opinion on the proper twist rate for a .45 ML rifle.....one that would properly stabilize, with accuracy, the long bullets?
Billy
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Post by grouse on Apr 12, 2009 13:34:48 GMT -5
Grouse, What is your opinion on the proper twist rate for a .45 ML rifle.....one that would properly stabilize, with accuracy, the long bullets? Billy 1/24 i would assume. It's easier to change the length of the bullet. Most 45's are 1/30. The hollow point is excellant in the 1/30 twist. |
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Post by larryfox1 on Apr 12, 2009 15:32:40 GMT -5
Geouse, would droping the BoatTail from the .40's pick up enought weight to help stabilze it with the Tip's install?.Also do you know if Lehigh's has tried reduceing the Hollow Point opening Size any,and if so how did they preform?
Thanks
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Post by grouse on Apr 12, 2009 19:25:59 GMT -5
Geouse, would droping the BoatTail from the .40's pick up enought weight to help stabilze it with the Tip's install?.Also do you know if Lehigh's has tried reduceing the Hollow Point opening Size any,and if so how did they preform? Thanks The Boattail has already been dropped. The hollow point isnt that deep on the 200grn as it is. The current 200 HPworks way to well to change it.  |
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Post by Chris Champion on Apr 12, 2009 21:05:22 GMT -5
I know they are two different animals, but the 45 cal Pacnor barrels that many on the Savage smokeless board are converting to are 1/22 twist and many are shooting incredible groups with 40 cal 195g Barnes MZ bullet at speeds ranging from 2500 to 2700 fps. These tipped Lehighs may be real tack-drivers in a smokeless 45.
Grouse, do you know if the tipped 200g Lehigh is similar in length to the 195g Barnes?
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Post by grouse on Apr 12, 2009 22:01:37 GMT -5
Grouse, do you know if the tipped 200g Lehigh is similar in length to the 195g Barnes? They are alot longer. I will test them in a savage this week. I will also get them tested in the Pac-Nor 45 as well.  |
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Post by Chris Champion on Apr 12, 2009 22:15:54 GMT -5
Man those are long. Anxiously waiting those results.
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Post by screwbolts on Apr 13, 2009 6:34:03 GMT -5
Long is Good, BC is better (but that is mot in a 200 to 300 yard gun) and when they shed their pedals upon entry or shortly there after, you have a big Metplat that drives deep and leaving a good permanent wound channel letting the Pulmonary pressure drop real fast for guick kills.
Ken
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Post by Al on Apr 13, 2009 10:44:31 GMT -5
Grouse, What is your opinion on the proper twist rate for a .45 ML rifle.....one that would properly stabilize, with accuracy, the long bullets? Billy 1/24 i would assume. It's easier to change the length of the bullet. Most 45's are 1/30. The hollow point is excellant in the 1/30 twist. How much extra length did the tip add? Just seems strange that adding it would make the accuracy go thru the window like that. |
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