Bore Rider

[Mitty38]

Boy, this has been a very educational discussion.

 

[Mitty38]

I originally purchased the 311284U because I wanted a 200 plus grain “long range” bullet. I will most likely sell it. I have now picked up a two cavity Lyman 311290. This will be my next experiment.
I had wanted to attend one of the CBA matches that they have here in Washington State. My thinking was that I needed a long and heavyweight bullet for one of these competitions. But with our current health crisis this has been put on the back burner. Maybe next year!
Josh

When you get ready to let it go give me a pm. I have a very tight savage, it may work ok for me, considering I currently am just messing around with low node.
I have Only cast one time for my .38 spcl so far, a d am currently working on a pretty good pile of free to me stock for my savage.
But I see this in my future. If I have the cash at the time I would love to have first crack. Especially if I can save couple bucks over new.

 

[Joshua]

Mitty38,
I sent you a PM.

 

[CWLONGSHOT]

My trouble bore rider is a 358009. 280g and alot of NOSE!!

I havent been able to use it powder coated. But I have discovered a way to thin my coat more than it once was and Need to cast more and try again.


009 is the one on extreme left.


I bought the nose sizer just for this bullet... Not so good. Phone to NOE resulted in good information and the explanation that its a band aide at best and not the best option.
CW

 

[Ian]

See why I don't like bore-rideing designs? Actually, fussing with the two-diameter fit and the velocity limitations are just two of them. Spindrift gave you a good suggestion with the Ed Harris bullet, MP Molds has a better one called a .30 Silhoutte.

 

[Joshua]

See why I don't like bore-rideing designs? Actually, fussing with the two-diameter fit and the velocity limitations are just two of them. Spindrift gave you a good suggestion with the Ed Harris bullet, MP Molds has a better one called a .30 Silhoutte.

Ian,
How fast have you pushed a lubed and gas checked MP .30 Silhouette before accuracy deteriorated?
I don’t want to get into RPM Theory. Those archived discussions are a bit prickly. I am however curious about what your limit with this bullet was.
I really haven’t loaded anything more exciting than 16 grains of 2400 under both the 311291 and the 311041. I do have a pound of H4895 and was gonna try some out with cast, however I’ve read that it needs a heavier bullet and filler to work well. I’d rather not ring my chamber so I have held off going down that avenue. It seems that the 30-06 has a case volume that can be problematic with cast.
Josh

 

[Brad]

I’m not Ian, thankfully(?), bit have pushed the 30 sil Into the 2700 fps range and got 2” or so groups at 100. Pressures were well into the jacketed realm. Alloy was heat treated to 18-20 BHn, cast from mildly boosted range scrap. Think of 2.5-3% Sn and maybe .5-1% Sn.

That bullet will do as well at max velocities in a 308 or 30-06 as any cast bullet I can think of.

 

[Joshua]

I’m not Ian, thankfully(?), bit have pushed the 30 sil Into the 2700 fps range and got 2” or so groups at 100. Pressures were well into the jacketed realm. Alloy was heat treated to 18-20 BHn, cast from mildly boosted range scrap. Think of 2.5-3% Sn and maybe .5-1% Sn.

That bullet will do as well at max velocities in a 308 or 30-06 as any cast bullet I can think of.

Brad,
First, thank you for your reply.
I’m curious, what powder did you do this with?
Josh

 

[Brad]

I was using the 30 xcb case, a 30-06 shortened to 7x57 length. Capacity between 308 and 06.
I used RE15 quite a bit with good results. I would estimate pressures into the 45 K PSI range.

 

[Ian]

I got high 26s from the XCB with 1.5 MOA repeatable 5-shot groups. 23.5" barrel. I posted targets elsewhere. Hornady gas checks and soap lube. Got 2400 fps from the same setup in my M1A, 22" barrel, but had to use thick-necked brass in that one to get right at MOA.

 

[waco]

Running the same 30xcb bullet at 2600fps I could manage right around 2moa accuracy out to 500 yards in my Rem 700 .308

 

[Brad]

Waco, I think he is talking about the 30 sil, not the 30 xcb bullet.
The 30 xcb bullet also has shown an ability to go fast with good accuracy.

 

[waco]

Waco, I think he is talking about the 30 sil, not the 30 xcb bullet.
The 30 xcb bullet also has shown an ability to go fast with good accuracy.

My bad. Saw Ian's post and thought we had moved on the the xcb.

 

[Brad]

No harm, you brought up another very good bullet.

 

[Joshua]

5:30 Pacific Coast Time:
I seem to remember reading about a bullet called a 30 xcb. I didn’t realize there was a 30 XCB wildcat cartridge. It sounds like it would have a volume similar to my 7.7x58 that I form from 30-06. I assume that it has a nice long neck, hopefully longer than that found on my 7.7x58 or the .308.

————————————————

6:30 Pacific Coast Time:
And an hour later! After reading all about you guys forming 30 xcb brass back in 2014.
I am sad to say that I didn’t even know what a doughnut was. I don’t know if I made any when I used 30-06 to form my 7.7x58. I now can’t only blame my sloppy Arisaka chamber, and bad trigger for inaccuracy. I will now have to also blame one step shoulder forming and doughnuts.
The more I learn, the less I know.
Josh

 

[Ian]

I meant the XCB rifle (30x57mm), not the third or fourth bullet designed for it and made by NOE. I ran the MP 30 Silhouette along with half a dozen others or maybe seven in my XCB rifle (SAAMI .30-'06 throat), the 30 Sil did the best. It also did the best in my M1A (.308 Winchester SAAMI throat) but I didn't have the NOE 30-165 to run in it at the time and am shooting sub-moa with powder-coated .30 Silhouette bullets nowdays with no fuss or special, thick-necked brass, just WCC '08 brass trimmed, pockets prepped, flash holes deburred, VLD inside chamfered and outside deburred. No neck turning.

 

[Mitty38]

@Joshua I have managed to check and powder coat those 311284's.I got from you. Also have managed to get them to size as big as. 311 at the base and the noses come it to .303 to.304.
Shot some over Red Dot. 2 moa. With a .310 base.
Planning on getting a. 303 sizer to make the noses consistent. See if I can not tighten up the groups.
Then It may just be on to other powders and bigger velocities.

 

[CWLONGSHOT]

I was just measuring the 335's and 299's I cast least weekend. Both those noses are running same 303 ish avg. BUT the 299 has a "ridge" on one side that about 308!!! The 335's have "seam" marks they run 307...

I might do same a d uniform noses 304/305. Should be easy enough.

But Ill shoot as is first a d see what I get.

I have a 311284 coming from Brad that should have smaller nose. But as long as Im under 305 I should not see issues. IIRC he said the nose on my mold was .297 ish. Thats PLEANT of room even for a super heavy PC coat!

CW

 

[Mitty38]

Ye I don't see any issues with the noses being. 303 . 304 or. 305 with my rifle but I just want to make sure the variation in PC thickness is not an issue. So I am buying a Lee sizer an lapping it out. To size the noses. Figure for the price of one it is worth trying out.