Well, I got her assembled this morning but it is not ready to shoot yet. I have another two days to wait for the bedding to fully cure. No sense pushing things and have the bedding set back anywhere.
I designed this rifle as my Extreme Sporter model from APS. For a full size rifle, very light weight, alot of power and alot or reach. Here are a list of the componants I used in this rifle:
-Rem 700, Chrome Moly receiver, Fully accurized
-Gre Tan Striker assembly
-Factory trigger tuned to 1.75 lbs
-Holland Comp Recoil Lug
-Lilja SS #3 contour, 27" 7mm barrel 1-9" twist 6 groove
-Defensive Edge 1/2" thread triple port brake
-H-S Precision Sporter stock Forest Green with Black web
-H-S Precision DM system
-APS Skim bedding
-Defensive Edge flat black teflon coating
-Burris double dovetail two piece bases
-Burris low 30mm Signature rings
-Leupold Mk4 3.5-10x 40mm TMR FFP
-Harris BR bipod
As she sits in the pic I would guess it to weigh right at 8.5 lbs, maybe a hair more with the bipod. I could have really dropped the weight down more had I gone with a lighter scope then the Leuy Mk4 but it is plenty light enough to allow for the scope upgrade.
This is the new Front Focal plane Mk4 from Leupold. Finally they decided to come out with a FFP scope and I think this may be one of the best LR big game scopes out there. Only thing I think that would rivel is would be the same model in a 4.5-14x version.
With the 40mm objective you can keep the scope down close to the receiver. This rifle feels amazing to shoulder and the scope positioning is RIGHT there. I am already in love with this rifle and have not even shot it yet!!
This rifle has a barrel much lighter then what are common on my LR hunting rifle and that is because this will be my "go to" general purpose big game rifle. I designed it to be able to reach out 800 yards on big game but also to be able to be packed around all day in hard country all day.
I also wanted it to be usible in close cover as well as open country. This is the reason for the shorter then usual for me 27" barrel and lower powered scope at 3.5-10x. Personally, I feel this is plenty of power for taking high quality shots at deer size game and larger out to 1K yards easily. Some prefer much higher powered scopes but I have never been left wanting more then 10x even out to 1000 yards on deer size game. As I will be limiting my shooting to this range and probably much less with this rifle, the 3.5-10 is about as perfect as it gets for my needs and the FFP reticle makes it even more useful allowing me to use my reticle on any power as a reference point drop system.
I plan on using the 200 gr ULD RBBT in this rifle. In my 30" barreled rifles I loaded this bullet to 3200 fps comfortably. The 7mm AM has more to offer with a 30" barrel length but to ease things for the J-4 jacketed bullet I feel 3200 fps should be the limit.
As that is a comfortable load in the 30" barrels, I suspect I may well be able to reach the same velocity potential in the shorter 27" pipe running full pressures for the case design.
I will be very happy with 3100 to 3150 fps if that is what the result is. That velocity with the BC of this bullet will still stand alone ballistically in any 7mm crowd and pretty well most any caliber out there.
My only question is the 1-9 twist. This is an experiment to be honest to see what the slower twist and 6 groove rifling design will do with the J-4 jacketed bullets.
In some prelim testing with a Rock 1-8 5R barrel, this bullet was able to be driven to 3350 fps with fine accuracy. I am predicting the 6 groove Lilja will perform nearly the same and allow a bit more velocity potential with less stress to the bullet.
We will see.
Final goals, a 200 gr ULD RBBT at 3100-3200 fps in a 8.5 lb class rifle with 1000 yard reach. We will have to see what happens when the bullets fly.
If the 1-9 proves to be not enough to stablize the 200 gr ULD RBBT at long range, I have some 175 gr and 169.5 gr ULD RBBT 7mm bullets waiting in the wings to jump into the fight. I have no doubt about this twist with these two bullet weights.
Because of the relatively light barrel, I am not expecting or demanding 1/4 moa groups from this rifle. In all honesty, if I can get the ULD RBBT bullets to print in the 1/2 to 3/4 moa average range for three shots with this rifle I will be happy as can be. If I can get this level of consistancy at 100 yards, I am not worried what will happen at long range. Tend to get lower in moa measurement from 100 yards out anyway.
Hope to get the barrel broke in by end of next week and some range reports by next weekend. Back to work for now though [img]/ubbthreads/images/graemlins/grin.gif[/img]!!!