Here are a couple of pictures of my Winchester M70 in 300 Jr....

































DAVID

Okay guys, here is a list of specs on this rifle...

ACTION: Winchester M70 / blue-printed / set up as a single shot...

BARREL: Lilja / 30" / 3 groove / 1.250" diameter / D&T muzzle brake / overall barrel and brake length - 31 1/2"...

CALIBER: 300 Jr. - based on a maximized 280 Remington case, necked to .30 caliber / minimum body taper / 40 degree shoulder angle...

STOCK: McMillan Tooley MBR...

TRIGGER: Rifle Basix / rebuilt / adjusted to 10 oz...

BASE & RINGS: EGW scope base and Burris Signature ZEE rings...

SCOPE: Vortex Viper 6.5X-20X-50mm with 30mm tube / fine duplex reticle...

BI-POD: Sinclair F-Class...

Heavy duty firing pin spring and titanium firing pin...

In forming brass for the 300 Jr., start with new 280 Remington brass...

Neck brass up to .35 caliber...

Neck brass down to .30 caliber to created a secondary shoulder for proper headspacing...

After fireforming, the new case has minimum body taper, a 40 degree shoulder and maximum powder capacity...















Any questions, just ask!

DAVID

Lots of great pictures! Looks like a fun project. But what is the end result? What bullet are you using? How fast? What is the group size? Are you going to use Nosler new Accubond Long Range? Inquiring minds want to know!

This is the only load I have developed so far -

CASE: Federal 280 brass / reformed / fireformed...

PRIMER: Federal 210 Match...

POWDER: IMR-4350 / 62.7 gr...

BULLET: Hornady 155 gr. A-MAX

VELOCITY: 3,312 fps...

ACCURACY: 1 1/2" 3 shot average @ 600 yds...

I don't like Nosler bullets and if I change, I'll shoot Sierra's 165 gr. B.T. Spitzer bullets....


DAVID

very very nice.

Does that rifle walk up to the game and shoot itself or is that just a real fancy bipod?

Deer Sniper wrote:

if I change, I'll shoot Sierra's 165 gr. B.T. Spitzer bullets....

Nosler has developed some long range hunting bullets with high BC. The 30-cal are 190gr 0.640 and 210 0.730

www.nosler.com/accubond-long-range

Paulie!! that was my line!! I was gonna ask if he had a leash for that thing cause it looks like it's gonna walk away.

Very cannon looking rifle Deer, I love that barrel. What made you decide on the caliber?

holy SMOKE!!!! just reread your specs
1st time I thought 1 1/2" ho hum
then I finally saw 600 YARDS!!!!! YOU THE MAN!!!

DS...that is about the sweetest looking rifle I think I have ever seen mate. You have achieved to an extremely high standard once again...and I have to clean the drool out of my keyboard, again.

What made you opt for a single shot mate? Nothing wrong with that idea, but I would have thought a 3 shot internal magazine might have been an option. Will you use this rifle for targets or long range hunting mate?

That looks like a devastating calibre...anything on the receiving end of one of those is a goner. The neck seems very short...how does it hold the bullet? Does very much of the bullet protrude down into the case? The accuracy of the round is awe-inspiring...1.5" at 600 yards is something that I have difficulty comprehending. I think Elvis has summed it up nicely for all of us mate.

Now that is a very interesting and stable looking bipod. I've never seen one before and it gets some pretty good write-ups.

All in all...you've done it again mate. You level of workmanship and design never ceases to amaze me. Simply a beautiful rifle that anybody would be proud to have in their gun cabinet.

Elvis - since I built this rifle for shooting at longer distances, I figured why not sight in and shoot at the longer distances. I'll post targets after I get in a little more trigger time and get my loads finalized....


Suzanne - I was planning on chambering this rifle for the 30-284, but had a change of heart just before I got the reamer slopped up and ready to make the first cut. The 300 Jr. is a cartridge that I designed and developed back in the early 90's. I made the first rifle chambered in this cartridge for my dad, because he was a "Jr." and after I completed the rifle and documented 2 long-range kills with this specific rifle, I was boxing it up and getting ready to ship it to my dad, when my sister called and said that our dad had just passed away. Unfortunately, he never got to see his rifle. The cartridge though, it is still my most favorite .30 caliber cartridge of all time and this Winchester rifle was built - thinking of my dad....


Hi Vince - you always have a way with words and I appreciate your compliments very much - Thank You!

I have just always preferred to use a single shot and every rifle I own is a single shot, either by design or customization. With my own testing that I did years ago, I have found single shot bolt action rifles to be just a little bit more accurate than repeaters. I can also load bullets long and not have to worry about magazine length. A 3 shot internal magazine was an option, but something that I personally just don't care for...

The neck length on my 300 Jr. cartridge is .200 long and it poses no problem in securely holding bullets in place. I throated this chamber specifically for the 155 gr. Hornady A-MAX bullet and the base of the shank is even with the bottom of the neck. I have full use of the cases powder column with nothing wasted...

1 1/2" groups @ 600 yds.? That is the same accuracy criteria that I hold for any long range rifle that I build for a customer. Doesn't matter if it's for Military, Law Enforcement, or a long-range hunter shooting deer or prairie dogs. If the rifles I build are not accurate, then they are about as useless as the the proverbial tits on a boar hog...

This is my first time to use the Sinclair F-class bi-pod and I must say, it IS one of my best investments! It is rock solid, has a side to side tilt that you can lock in place and both legs are fully adjustable. If you don't want the rifle to tilt, lock it in place and it don't move! I really like the "rocker" design of the feet and that works equally well on the shooting bench or lying prone on the ground...

Whatever this rifles "first kill" is, you guys get first pics - crow, coyote or deer...

Oh yeah, sorry about the keyboard drool....

D/S

Very nice...Now if only you had a nicer shooting table to shoot it from.

Beautiful!!!

Bushmaster,

if you'll come build me one, I'll let you fire a couple of 600 yd. groups from my new build....

Hey DS-just a couple of observations;That old stall mat looks like it does the trick on the shooting bench-I lined my f350 bed with them to keep down the noise and keep stuff from slipping-also in the horse trailers!
What is the benefit of using 280 rem brass over 30-06 brass-same cartridge casing,or 35 whelan?Just a DA question!

Yup...Horse trailer mats.