Author Topic: 30/06SweetheartReport  (Read 600 times)

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Offline rifleman61

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30/06SweetheartReport
« on: May 21, 2006, 08:53:04 AM »
A test firing of the H/R30/06 Ultra [22" barrel] was conducted on 20May06 at the Tiverton R/GC at 1200 hours.
Range conditions were bright with high overcast and temperature at 68deg.F with wind from 1:00 to 3:00 gusting 15-20, low humidity, wakes not seen in scope.
All test firing was conducted from bipod at 150 yards of zero.
Weapon trested: H/R 30/06 Ultra with trigger gaged at ~3-1/2 lbs. and 1:10 twist.
There were no departures from factory specs.  Barrel was not floated ,"o" ringed, or bedded.
Scope used for test was a Springfield Armory ART IV 3-9 set at "9" power.
House keeping measures employed were standard, with bore scrub[twelve strokes] with standard bore solvent "Shooter's choice" and phosphore bronze brush followed by bore polishing twelve strokes with clean cotton waste patching to give bright bore without rifle, prior to firing and between three suuccessive six round strings of fire,for record.
Two sighters were used prior to record firing.
First sighter recorded at 11:00 on 9~10 ring line with 1 minute of elevation.  Second sighter was at 12:00 on 10~X ring with 1/2 minute of elevation.
Rounds used:
Brass--Winchester 30/06 factory brass once fired, all brass trimmed to 1 mil. under National Match specs. [2.494NMS] to 2.493 sized, primer pockets buffed and tumbled to factory new finish.
Primers were WLR
Heads used were Sierra MatchKing 190 gr. boattail
Rounds with heads seated were set at 3.353" exceeding Natrional Match Spec. +1.3 mils to utilize generous freebore of H/R barreling.
Powder used was Hodgdon 4831-56.3 grs. at ~ 2600fps velocity
Three six round groups were fired for record all recording in the 10-"X" rings, two in the "X" ring and one in the 10 ring at 1:00 o'clockbreaking it intermittently.  The tightest group in the upper crotch of "X" was .875" center to center [six rounds]. The second tightest group was in the "X" ring with [six rounds] displacing .9375 [15/16ths] center to center at the 4:00 o'clock position.  The loosest group was at the 1:00 o'clock position encroaching on "X" in the 10 ring with extreme spread at ~1.00 " center to center.    
Evaluation: Recoil is noticeable being that 190 grain bullet was used but not unmanageable, a 150 grain bullet would considerably "smooth" things out gaining some velocity but accuracy would suffer at the other end, though the extent of this loss is not known at this time.  The 190 grain Sierra MatchKing is an inherrently accurate bullet with a short ogive and a very long bearing surface with a S/D--B/C of .289/.533 against the 150 grain bullet of .226/.389.  This makes it a very dense and flat shooting round; and this differential makes the combination of bullet and weapon a near perfect blend for distance and accuracy,with a character of "tactical" coming to mind; 600 yard single shot kills should not at all be unreasonable.


Anchor's Away/Semper Fi
COPO Bull

Offline myarmor

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30/06SweetheartReport
« Reply #1 on: May 22, 2006, 12:41:07 AM »
Under an inch, with a brand new barrel, not polished, or modified in anyway, off a Bi-Pod...and at 150yards.. :toast:  Not bad at all I say.
After a good break in period it will be interesting to see what your -06 can really do cause you already got an excellent start.
 Ya got to get yourself a camera and show us the range, set up, and targets.
-Aaron

Offline EVOC ONE

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30/06SweetheartReport
« Reply #2 on: May 22, 2006, 01:30:21 AM »
Great shooting, Rifleman.  Looks like you have a winner there.  Very comprehensive report, as well.

The recoil on my Handi .30-06 was noticeable with 180's.  I cut a piece of steel rod I had laying around, put plastic caps that I found in a parts bin at Loews on each end and placed it in the stock channel.  The recoil is now at the level of my .280 with 150's.  Very comfortable to shoot from the bench for extended session's at the range.

EVOC ONE

Offline rifleman61

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notfinishedyet
« Reply #3 on: May 22, 2006, 10:48:53 AM »
This was an initial test firing.
My general philosophy is to consider each weapon as it comes to me at purchase to be good without any faults; that is a zero base, and I work from there.  If I don't have to bed or "float" I don't do it, until the operational history of the weapon indicates otherwise.  Generally I consider normal housekeeping as sufficient.
I have an instinctive fear of doing anything to the bore of the weapon in the way of "ploishiong" or lapping, as it were.  A good gunsmith can lap the bore at the time of manufacture, or barring that because he has the facilities to support that operational evolution.  I "shoot it in"; that's the way I was taught in the Navy and the way any number of "Gunnies" emphasized to me.  I look at three areas when I consider a weapon:

--lock work [the trigger].  At ~3.5lbs the H/R trigger is one of the best on the market; it breaks crisp and clean.  While I have seen and read some of the inputs on this web concerning the trigger, I consider them anecdotal at best and excptional at worst.  So, this critical area is a constant; my findings in this regard do accord themselves with the American Rifleman Report on the H/R BC trigger.
--Sights very critical, in the instance of the "Ultra" line.  the Springfield Armory ART IV is a spare sight I had in my shop; it's good, but old; and, I do want to avail myself of the latest in optics.  So, I shall change them at the soonest possible moment.  Having been taught long range shooting I tend to a moderate magnification tactical scope, 4-16 with range finding capabilities.  It has been my experience that at upper levels of magnification [20 and above] "scoping and doping" can get a bit dicey, as the upper levels of magnificatiopn exaccerbate your pulse breaks when you have the weapon in battery and are sighting the target.  This becomes all the more noticeable when you have a sling belt engaged in the armpit region of your anatomy; even a shooting coat won't minimize it.  You can actually see the cross hair reticle bounce with the systolic cycle; I don't know about others and what I say here is not to be taken as a criticism; but that sort of thing irritates me and serves as just one more variable to sort out. So it's on to new sights!
--"AMMUNITION"; this is the "GOLDEN CHILD", in mine own estimation.  aside from good sights, this is the one area that I have the most influence in.  I have seen average weapons perform with brilliance because the rifleman took his time and crafted a round that was matched to his weapon and then made it consistently forever after.
While there are those who will read this thread and laugh and make remarks about "meat on the table" and I do respect that, and they are quite right, my approach is clinical.  I believe that the only purpose of a rifle is to "kill"; it has no other purpose and it must be made to kill efficiently, quickly , simply, and from the farthest distance as possible, given the conscientious observance of the fundamentals.   Which ever weapon I pull from my armory I want it to come into my hands with the comfortable assurance that the round I crafted for it will exploit its characteristrics to the maximum.

I like the suggestion to get a digital camera; I will do that for the next session.

Anchor's Away/SemperFi
CPO Bull