Remington No 1 Creedmoor

[J.B.]

I'm curious as to the variations in fire formed cases also. Any chance of a photo comparing ..say a round from the current Shiloh chamber and your Remington? The jump an unfired Jamison case makes to fill the Shiloh chamber is quite remarkable and I'd be interested to see the difference. I know there is a difference in the neck area between a pp chamber vs gg but beyond that ? Also would be interested in the twist rate of your Remington especially if it was purpose built for Creedmoor .

regards... J.B.

[Fogman01]

I'm curious as to the variations in fire formed cases also. Any chance of a photo comparing ..say a round from the current Shiloh chamber and your Remington? The jump an unfired Jamison case makes to fill the Shiloh chamber is quite remarkable and I'd be interested to see the difference. I know there is a difference in the neck area between a pp chamber vs gg but beyond that ? Also would be interested in the twist rate of your Remington especially if it was purpose built for Creedmoor .

regards... J.B.

The 4 cases show a new 44-77 Jamison case, a fired formed Shiloh case (loaded), a new case that I expanded the mouth to accept the Remington Creedmoor 44 S bullets, and a fired formed Creedmoor case. I call the Remington ammo Creedmoor 44 S because of the differences in case/chamber size and the chamber allowing the bullet to be chambered way out at the end of the case. And all that is why Remington marked the barrel "44 S".
The case with the bullet is a fired formed Shiloh next to a fire formed Creedmoor 44 S.Then the picture of a new case next to one I expanded. The dimensions are the outside of the case dimensions.
The dimensions are:
New case: neck .461; shoulder width .506; and base .513
Shiloh fire formed: neck .465; should width .507; and base .514
Creedmoor 44 S: neck .471; shoulder width .514; and base .514.
The length of the neck to where the shoulder starts to expand is .576 for the Shiloh and .629 for the Creedmoor. You can see the Creedmoor 44 S chamber is quite a bit larger than the Shiloh. But since the new brass works in either rifle, it doesn't matter to me. The bullet in the Shiloh case is a .446 grease groove. That bullet will almost slide all the way down the Creedmoor barrel without and help!
I had expanded the case mouth with a .45 expander die to allow me to put the paper patch bullets into the new case mouth. The bullets I am trying are 550 grain .446 diameter paper patched. They will just barely slide into the fire formed Creedmoor cases so no more expanding once they are fire formed. They also seat about 1/16 to 1/8" into the case and still will chamber just like the they were meant to back in the day. I don't know what the twist is on the barrel. I will let you know if I can get any good groups with this rifle and the pp bullets. I don't have any increase in accuracy with my pp bullets over my gg bullets. My gg do well the pp not so much.



           

[J.B.]

Thanks for the photos FM. and sorry it took a few days to acknowledge them. The photos do help with the overall description though and it appears your Remington blows out to a straighter case wall that the 'already fairly straight' Shiloh chamber although they are pretty close to each other when compared to the basic case. I've been predominantly loading gg bullets in my rifle but several moulds down the track I'm using a gg bullet with graduated bands that allows seating less than .2" in the case. With that allowance, 87 gns of Swiss 1.5 is fairly easy to load with a .06" wad and only the slightest compression. I wonder.. as had been suggested elsewhere, that the chamber in your rifle has the slighly larger neck to better match the increase in groove diameter of the barrel ? The inside diameter at the neck on a fired case when compared to the bore & groove diameter may be a better indicator of what your 'slick' ..and then your patched bullet should be. Just a thought anyway. Would really like to know the twist rate if you ever get the chance to check it. Thanks for the effort with the photos.
rgds.. J.B.

[Fogman01]

It definitely has a slightly larger neck than the Shiloh 44-77. I will continue to test loads and post the result.