Who makes bthp molds?

[turbo1889]

Not wife (unfortionatly) . . . long time, steady girlfriend, (like nearly a decade now). She is an only child. She is less trouble then she is worth but only because she is worth a lot (she can also be a lot of trouble).

My advise to others seeking a similar woman (apparently you) would be to be warned that all women are trouble. Some are more trouble then they are worth and some are less trouble then they are worth. The thing with the kind of woman I have is that you will have the kind of trouble with her that you would not normally expect from a woman and you can get blind-sighted by that.

You wouldn't expect a normal women to give you trouble by doing the "I've got more heads on the wall with bigger horns then he does" line in front of your buddies. This kind will and that is only the start of it. Just a heads up so you get somewhat of an idea what your getting into. You can never actually know until your actually in deep but just a warning that they are all trouble and it is a matter of whether they are worth more then the trouble or not. This kind is just a different kind of trouble that is all.

And yes, I love her like crazy, otherwise I would have been out of this years ago.

[MtGun44]

I suggest that anybody that worries about boat tails really does
look up the real world drop difference at any kind of hunting range
(IMO 400 and in) with something like a .223 or .22-250. I think
with the big and slow, it will be even less important.

Sierra has a 55 gr SPT (1360), a flat base design. The BC above 2900 fps is .237
They also have a 55 gr SBT (1365), a boat tail design. The BC above
3000 fps is .250. That is a 5% improvement in the BC.

Bill

[J..]

I had a Siamese Mauser in .45-70 that I used to use as a test platform for various .45-70 bullets. I had an NEI 458" 425 boattail spitzer mould and ran off a few bullets. Shot them against a plainbase RN that was also 425. Same load of powder, same gun, same everything....everything was identical except the shape of the bullet. The BT shot about 18" flatter at 200 yards than the plainbase RN.

[Whiterabbit]

I'm left wondering if thats exactly what is ballistically predicted based on differing BC values.

[btroj]

18 inches flatter at 200? Wasn't because of just bullet shape.
Change the bullet shape that much and it changes the dynamics of recoil. A small change in barrel time or vibration could mean that bullet hit 18 inches higher at 200. Key is, where did those bullets hit in relation to each other at 50 and 100 yards? If the BT spitter was higher at 100 then you don't have a real compairison, do you?

[Shiloh]

Nobody makes boat tail bullet moulds. They do make moulds with a bevel base but that is it.

I've seen pics of boat tail bullets. Maybe even on thsi board. Not BB mind you, BT boolits. I have no idea who made the mold.

SHiloh

[1845greyhounds]

Accurate Molds makes some semi-pointy 46 cal (0.458"+) molds. I also thought about getting pointy 46 cal boolets. When I started looking at it harder, I decided it wasn't worth the trouble. The trajectory gains were meager and I could compensate for them with a range finder and a ballistics table. Still, pointy bullets look cool, so here's a couple links to some relatively pointy molds. Good luck.

http://www.accuratemolds.com/catalog.php?page=10

http://www.accuratemolds.com/catalog.php?page=11

If you really want pointy 0.458 pills and are willing to shoot jacketed, consider the Barnes 300 gr semi-spritzer.

[btroj]

Pointy bullets may be fine in a single shot but they aren't gonna do squat in a Marlin.

[Doc Highwall]

Hollowpoint is making one now and is working on design number 4 or 5, as far as producing a good workable design is going to take a while longer.

The only true way to say how good a bullets ballistic coefficient is over another is to fire it over two chronographs at the same time with one being at the muzzle and the other one at 200 yards or farther.

By knowing the muzzle velocity and how much velocity it loses at 200 yards you will be able to compute the ballistic coefficient.

Another way to show how much flatter one bullet is over another is to zero the gun at 300 yards and shoot it at 600 yards with out making any sight adjustments. But in order for this to work both bullets would have to weigh the same and have the same powder charge.

[TXGunNut]

I suggest that anybody that worries about boat tails really does
look up the real world drop difference at any kind of hunting range
(IMO 400 and in) with something like a .223 or .22-250. I think
with the big and slow, it will be even less important.

Sierra has a 55 gr SPT (1360), a flat base design. The BC above 2900 fps is .237
They also have a 55 gr SBT (1365), a boat tail design. The BC above
3000 fps is .250. That is a 5% improvement in the BC.

Bill

Back in my j-word days I got out a calculator and ballistic tables (remember those?) and did the math on a legal pad for 165gr BT bullets in my .30-06. Difference was negligible until I got waaay past my comfort zone for a hunting shot. I even tried a few BT's in a problem rifle awhile back hoping the difference in bearing surface would make a difference. It didn't. Go ahead and crunch the numbers, today you can probably use a computer to do it. As noted above it will be an exercise in futility.
Those BT gas checks do look kinda sexy, tho

[btroj]

Anyone ever woder why the BR shooters use flat based bullets at 100 and 200 yards? Maybe it is because at those ranges they are more accurate.

I also have never heard of a BPCR shooter using a BT cast bullet. I am sure that if they were an advantage that crowd would be all over it.

[Bandit86]

Sorry guys, work had left me little time to visit.

Why? Because my rifle has 3500ft/lbs of muzzle energy and barely 1000 at 300 yards, basically drops 800 ft pounds for every 100 yards. I simply wish for my bullet to retain bit of velocity velocity hence retain energy. That's all. Impossible? Maybe. But the idea of throwing a 400 grain chunk of metal to 400plus yard excited me

I would like to do a bit of slow speed (sub sonic?) cowboy shooting (Cas member) and use the slow lead bullets for intermediate distances

I shoot both the 325 grain leverevolution that drops only 21 inches at 300 yards and 350 grain jhp that drops 38 inches, the factory 325 kills the shoulder, my reloaded 350 are nice and mellow yet just as fast, is like to find what powder the factory uses

[bhn22]

It would be a really long bullet, requiring a really fast twist barrel. Even the jacketed bullet manufacturers don't offer a .458 boat tail, and the Quigley guys use square, plain-based bullets. This suggests to me that such a bullet design is ballistically impractical. Especially in a magazine rifle. You'd get none of the benefits, and all of the headaches. You could likely have a mold custom made, but I suspect your bullet weight would need to be kept around 300 grains or so to make it fit in the magazine. Then would you be able to drive it fast enough to see any benefit?

[ohland]

Anyone ever woder why the BR shooters use flat based bullets at 100 and 200 yards? Maybe it is because at those ranges they are more accurate.

It takes time for a boat tail (or any bullet) to go to sleep (nutating, or yaw, IIRC). So for ranges 200-300 yards, a good plain base is just as competitive as any boat tail.