Building a long-range rifle in 300 Jr.

Deer Sniper · Super Member Joined: Apr 26, 2007 Posts: 539

Depending on brass used, measured water capacity to the base of the neck can be as much as 71 grains.

hunterjoe21

Deer Sniper wrote:

I make hand dies for the 300 Jr., that I cut with the same reamer that I use to cut the chamber. The size die uses interchangeable neck bushings...

For bullet seating, the customer has the choice of using a Hornady .30 caliber universal bullet seater or a hand die that is cut with the same reamer, then have a micrometer bullet seater...

If you are interested in me building you a rifle chambered in 300 Jr, send me your address and I will send you a fireformed case...

DS,

I’d love to have you build one for me, but I’m gonna need to replenish the savings first. A new Ruger and radar unit have me tapped out currently. Plus I need to get the Harley ready for riding season....

Deer Sniper · Super Member Joined: Apr 26, 2007 Posts: 539

slimjim

Looks great! What is the crown angle?

Deer Sniper · Super Member Joined: Apr 26, 2007 Posts: 539

15 degrees.

slimjim

Deer Sniper, I'm inquisitive. I always been told 11 degrees with the optimum target crown. What is the rational for 15? Thanks.

hunterjoe21

Beautiful work, I’m always amazed when I see something like this come together.

Out of curiosity, have you estimated the weight of the final product?

That’s a long azz barrel with a pretty significant chunk of steel out there on the end of it.

I realize that part of the accuracy equation is rigidity, which often comes with weight.

Vince

The barrel and muzzle break look magnificent mate. The mating of the two is so fine it looks like the lot was machined from a single piece of steel.

I'm curious as to the coating on the barrel...what is it mate?

Elvis

very tidy...could you gain neck length by starting out with a .270 case????,just read today it was based on 30-03 not the 06???? so was longer...never heard that one before

Deer Sniper · Super Member Joined: Apr 26, 2007 Posts: 539

Slim Jim - that just happened to be the angle I got the best cut and finish on at that time...

Hunter Joe 21 - I haven't given any thought to the overall weight, because this is not my gun. The stock was factory weighted to 5 pounds, and I'll post the total weight once the gun is completed. There is over a pound of weight in just the base and rings...

Vince - Thank you for the compliment! No coating on the barrel. That is just a bead blast finish that I put on most all barrels I do, then buff it with an oiled 0000 steel wool pad...

Elvis - I first based my cartridge off the 30-06 case, but later found that by going with 280 brass, I could gain a couple grains more powder capacity. .220 is plenty of neck length to hold a .30 caliber bullet, and since the bullet should be .003 to .007 into the lands, the bullet will be in perfect alignment with the bore...

Elvis

good stuff mate,knew you wouldve thought it all through.... keep em coming this is very educational......might just have to be edited and stuck up as a sticky once its finished???? so its easy to find to return and drool some more.

Deer Sniper · Super Member Joined: Apr 26, 2007 Posts: 539

Elvis,

I was kind of hoping that all of the comments could be removed, once this rifle is completely finished, so all the pictures could run together, then guy's could post after all the pictures were posted... Good idea!

Vince

Deer Sniper wrote:

Elvis,

I was kind of hoping that all of the comments could be removed, once this rifle is completely finished, so all the pictures could run together, then guy's could post after all the pictures were posted... Good idea!

We can do that mate.

Deer Sniper · Super Member Joined: Apr 26, 2007 Posts: 539

Thank you Vince!

Deer Sniper · Super Member Joined: Apr 26, 2007 Posts: 539