6PPC At 400 Yards........

jackie schmidt

jackie schmidt

New member
6PPC At 400 Yard "Shatterblast".......

Walker County Benchrest is hosting a 400 yard "Shatterblast" this coming Saturday. The match will consist of shooting forty 2inch diameter clay disc, 10 at a time on each Match. I believe each shooter will be allowed 13 loaded rounds at the Bench for each match to hit 10 disc.

Flags will be permitted.

I am going to shoot a 6PPC, since I don't own a true long range Rifle in a configuration to utilize true High BC bullets. I have been looking at ballistic charts, and that little 68 grn BT is going to get kicked around pretty good out there.

But it will be fun. So come out and join in.
 
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Jackie,

The 95-105gr VLD with a 8" twist PPC barrel WILL shoot good at 400+ yards. I'm guessing you don't have time to put it together though. We had a 300 yard match a few times at Raton. I had made some 130gr BT bullets with a .040" meplat on a 1" jacket. The estimated BC was .390. That was about all I could get out of a 18" twist barrel. I felt like the BC advantage would give me a sure win against all other shooters, since most of the PPC's would have a BC of closer to .280. Richard Brensing (not sure if I got the last name right) showed up with a 6BR, 8" twist, and 95gr VLD Bergers with a BC of .493, if I remember right. It was a very windy day, so BC ruled. Richard took 1st, I took second, and all the PPC's with the poor BC's followed at some distance.

Michael
 
We shot some pretty good groups at 300 yards some years ago, and some pretty bad ones too, but hitting a 2 inch clay disc at 400 yards might be rather difficult. Be sure to tell us how it went!
 
Tabular trajectory data at Non-Std. Atmosphere
Gunsite Altitude : 1500 ft.
Air Density : 0.076474 lb./ft³
-------------------------------------------------------------------------------------
Gun / Ammunition : 6 mm PPC USA
Bullet Type : .243, 65, Berger Column #24407
Bullet Weight : 65 grains or 4.21 Grams
Muzzle Velocity : 3349 fps
Twist Length : 11.0 in. (RH)
Gyro. Stability : 1.55
Crosswind Speed : 10.0 Mph
Ballistic Coefficient(s) (G1) :
C1_1=0.277@V>0 fps;


Optimum trajectory information :
Optimum sight-in range (X) = 219 Yds.
with max. ordinate above LOS at range (M)= 136 Yds.
and max. point blank range (P)= 252 Yds.
-------------------------------------------------------------------------------------
Sight-in clicks, 1 click = 0.318 cm/100 yd. or 0.125 in/100 yd.
Height of sight above bore axis = 5.0 cm or 1.969 inch
Gun is zeroed-in at 100 yds,
by sighting-in at level firing
-------------------------------------------------------------------------------------
Range Velo Time of Energy Path Spin / Wind- Total Sight correction Target
city flight to dage, Wind drop for setting new lead
LOS of 10.0 Mph zero range 33 fps
-------------------------------------------------------------------------------------
·Yards fps s ft.lbs. in. in. MOA in. Clicks MOA yds ·
-------------------------------------------------------------------------------------
| 0 3349 0.0000 1619 -2.0 0.0 ----- 0.0 ------ ----- 0.00
X 100 2984 0.0950 1285 0.0 -0.9 -0.86 1.7 0.0 0.00 1.04
M 105 2966 0.1000 1270 0.0 -1.0 -0.90 1.9 0.0 0.00 1.09
P 190 2680 0.1907 1036 -1.5 -3.4 -1.73 6.5 +6.6 +0.79 2.09
| 200 2647 0.2020 1011 -1.9 -3.8 -1.83 7.3 +7.9 +0.94 2.21
| 300 2335 0.3222 787 -8.8 -9.0 -2.86 17.8 +23.7 +2.82 3.52
| 400 2044 0.4598 603 -22.2 -17.0 -4.07 34.9 +44.5 +5.31 5.03
-------------------------------------------------------------------------------------
M = Peak vs. L.O.S, X = Set Zero, P = Max. Point Blank Range
Elevation above Angle of Site (0.0 deg.) = 0.0580 deg.
 
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Wilbur said:
We shot some pretty good groups at 300 yards some years ago, and some pretty bad ones too, but hitting a 2 inch clay disc at 400 yards might be rather difficult. Be sure to tell us how it went!
Click to expand...

Wilbur, we have shot two 300 yard Matches this year, one Varmint for Score, and one NBRSA Group. Both the score target and the group target have a 1.5 inch bull.

I only missed one bull in the score match, (shooting a 30 BR with 112's), and it was close. At the group match, (shooting my 6PPC), I only went over one inch once, a 1.130. All of the other groups were below .800.

We were shooting into about 4 inches worth of wind as the morning progressed. So reading the flags, both the 30BR and the 6PPC did quite well at 300.

But by the charts I am looking at, by the time it gets to 400 yards, a 68 grn BT has shed 35% of its velocity. If I start at 3400 FPS, that means it might be below 2000 by the time it gets there.

I have always believed that 300 yards is about the maximum range that a shooter can get a precision read on flags. Records show that at 300 yards, nothing will beat a 6PPC if the shooter gets a good read.

I'm just not sure if I can read flags that well at 400.

By the way, at our 300 yard Score Match, 1st place was a 30BR, 2d place a 6 Dasher shooting 105's, 3d place was a 30BR, and 4th place a 6 Dasher. So, I consider it a "wash" as to which might be the better.

If you don't have flags, the higher BC combination has the advantage. Most of these "clay bird" matches don't allow flags. Walker county does.

At the very least, the flags will allow you to see let ups and reversals.
 
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What about

your 721 Remington 30-06? A 125 Nosler ballistic tip or a 125 BIB 10 ogive, whichever the gun will shoot it well, should be dynamite at 400 yds., or a 155 but lost more recoil. My recollection is that the rifle was shooting in the low 3s?
 
PPC Long Range Advantage

A 7 ogive 112gr 30 caliber bullet has a similar BC to a 68gr 6mm BT. That makes it easy to see why the 6PPC has the 200 and 300 yard advantage over the 30BR. The PPC has about 400 fps advantage with the same BC. For many years, people have looked at my 30-30 as having a real 200 yard advantage over the PPC. This is simply not true. I have shot the typical 3000 fps 30BR node on many occasions, and actually had the same long range disadvantage. The only way I can buck the wind as well as the PPC is to shoot the warmer loads with 125gr 9 ogive bullets. That gives me a better BC, but still running less velocity, which comes out about the same. If one can get the new LT30 to make 3200fps from a 118-125gr 9 or 10 ogive bullet in the 30BR, and still shoot small aggs, then the 30BR will be more competitive against the PPC at longer ranges. Obviously considering Jackie's performance, the 30BR doesn't need any help at 100 yards. The PPC advantage that I've mentioned was quickly confirmed when comparing my 30-30's down range velocity to Durward Wofford's 8.5 ogive BT 6mm bullets using my Labradar.

Michael
 
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glp said:
your 721 Remington 30-06? A 125 Nosler ballistic tip or a 125 BIB 10 ogive, whichever the gun will shoot it well, should be dynamite at 400 yds., or a 155 but lost more recoil. My recollection is that the rifle was shooting in the low 3s?
Click to expand...

The only loads I work with in that '06 are with 178 grn A-Maxes. 61.3 grn of 4831 shoots really nice, but it knocks the cr-p out of you. I thought about getting a 1-12 twist barrel to shoot 125-130 grn bullets, but never got around to it.

Also, I messed around and caught myself out of 4831.

I shot this at 500 yards last spring.

http://benchrest.com/attachment.php?attachmentid=18298&stc=1&d=1472758839
 

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The PPC should work ok at 400yds. We have people shooting them in a Groundhog match out to 500 m.
 
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