cast boolit limits

[jballs918]

can you push a cb up to 2800 to 3000 fps. or is this just to much for it. im looking at some loads for a cb and they are around 2100 fps. i was just wondering if you can push the 2800 mark or not with out awful leading. thaks guys

[SharpsShooter]

Sure you can push velocities up to 2800fps. You need to keep in mind though that strength of the alloy, and the fit of the boolit in both the throat and bore become very critical. It can be done and has by several here. I figure they will chime in with more info than I can give you, but yeah, It is possible.

SS

[cast-n-blast]

I get just over 2700 fps with the RCBS .35-200 gr GCFN over 63.0 grs. Win 748 in my Ruger MKII 35 Whelen. Not a streak of lead, and groups run 1-1.5 " for 3 shots at 100 yds. LBT bullet lube is used.

[felix]

Leading becomes prevalant just above 2400 and on through 2900, but at 3000 and above the leading disappears because the lead is compressed so hard against the barrel and has no time to leave a trail. However, accuracy over 2400, leading or not, cannot be counted upon because of the "ugly" face which results from such a fantastic accelleration. So, 2400 is tops for all practical day-to-day purposes, using the toughest of lead, and even using the slower twists. ... felix


Yes, there are exceptions to the above criteria, such as that posted by cast-n-blast. Nose construction has a lot to do with it! ... felix

[David R]

Remington 700 VS
22-250
26" barrel

Lyman 225646 60 grain bore rider of pure Lino

LAR45's Lube!

18 grains SR4759

AV 2684

1.1something at 100 yards, 5.5" at 300 10 shot groups

It can be done :)

I was trying to get this gun to shoot lead when I joined this board. They all helped me.

Thanks to everyone here
David

[w30wcf]

jballs918,

It's easy to do in the .22 centerfires, mostly because of the lower sectional density of the bullets.

With a 12 b.h.n. bullet in my .22 Hornet, I can get 2,700 f.p.s. (45 gr.bullet) with good accuracy and 0 leading.

In my .22-250, using a 55 gr. 20 b.h.n. bullet, 3,100 f.p.s. is obtained with good accuracy and 0 leading.

In the .30-30, using a 88 gr. 20 b.h.n. plain based bullet + .06" thick poly wad, a capacity load of REL 7 goes 3,000 f.p.s. with good accuracy.

w30wcf

[StarMetal]

I can get 2700 fps out of my 7mm-08 using the 135 gr Lee and it doesn't matter if it water quenched ww's or harder. This rifle has 1 in 9.5 twist. I'm not totally sold on the strength of the alloy. I believe the base of the bullet, how it's protected that is, and other factors have more to do with it.

For some reason the 22's do seem to be able to blast them faster. I've shot 55 RCBS cast of a very soft alloy out of my AR 15 with 1 in 7 twist at over 3000 fps. Not target grade accuracy, but not shotgun groups either. No lead, but then again it has a chromed bore and I'm of the belief that a chromed bore is might hard to foul with lead or jacketed.

Joe

[Bass Ackward]

can you push a cb up to 2800 to 3000 fps. or is this just to much for it. im looking at some loads for a cb and they are around 2100 fps. i was just wondering if you can push the 2800 mark or not with out awful leading. thaks guys

Cast bullet limits? They start to leave a vapor trail at 3400 fps looking much like a tracer round. They totally melt before 100 yards at 3500 fps in the air we have here. @ 500 FASL with 50% relative humidity.

[StarMetal]

Bass,

I can test that out. I have some 45 gr cast that I know I can push that fast in my AR15, coupled with that 1 in 7 twist, it should make for a good test huh?

Joe

[Bass Ackward]

Bass,

I can test that out. I have some 45 gr cast that I know I can push that fast in my AR15, coupled with that 1 in 7 twist, it should make for a good test huh?

Joe


Joe,

Give it a whirl.

I was using a 22-250 with a 14 twist (26") so I didn't have to run pressure right up on the top to get there. Larry Gibson once told me that out where he is that you could start to see it around 2600 fps if you have a darker background. I think that was some 14 BHN LBT Spitzers that I sent him to try.

[buck1]

I think 2200fps is the limit for the easy loads . But with work and lots of testing, of lubes, BHN, boolit fit,powder and a bit of voodoo (LOL), 2800 fps with good grouping can be had. BUT it takes a labor of love to see it through.
I have a pet load for a 308 that took me over a year to dial in, But when it came in I was very pleased. 2500 fps from a 165 gr RCBS sil from a 14 in BBL that will stay just under a inch at 100yd all day long and kill game like you cant belive.

Go slow take notes and be mindfull of pressures that can skyrocket in a instant. But when you get it you will have learned very very much about cast boolits....Buck

[Bucks Owin]

Leading becomes prevalant just above 2400 and on through 2900, but at 3000 and above the leading disappears because the lead is compressed so hard against the barrel and has no time to leave a trail. However, accuracy over 2400, leading or not, cannot be counted upon because of the "ugly" face which results from such a fantastic accelleration. So, 2400 is tops for all practical day-to-day purposes, using the toughest of lead, and even using the slower twists. ... felix


Yes, there are exceptions to the above criteria, such as that posted by cast-n-blast. Nose construction has a lot to do with it! ... felix


So does that mean with a 95 gr G/C linotype Loverin .243, that 3,000 fps is "possible"? Would be a great varmint vaporizer if the accuracy was there....

Dennis

BTW, 1:10" twist...

[357maximum]

So does that mean with a 95 gr G/C linotype Loverin .243, that 3,000 fps is "possible"? Would be a great varmint vaporizer if the accuracy was there....

Dennis

BTW, 1:10" twist...
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Anything is possible, how bad you want it is the question.

I have seen things with the 35 whelen, that still ,make me look thrice at the data, to assure me I am not dreaming. I will NOT post his loads, but a drop tube and pre-compression is normally involved..

Michael

[ron brooks]

How high can velocities go without a gascheck? all of my 30 caliber molds are either bevel based or plain?

Thanks,

Ron

[9.3X62AL]

Buck--

The RCBS 6mm/95 grainer does fine work on rats at 1700-1800 FPS--no explosive disasssemblies like 60 grain Sierra .224 HP's at 3500, but jacks and ground squirrels are DRT (Dead Right There). I would think that such loads would work on edible small game at twice the range a 22 LR is capable of. I use 12.0 x 2400 to get 1.25"-class groups in the 243.

Carpetman has reported velocities past 2400 FPS with this same bullet in the 243, and good accuracy. Maybe he will add his loads here.

[felix]

Al, change DRT to DIRT for "dead intentionally right there". Couldn't help myself, sorry. ... felix

[felix]

Use plastic shotgun buffer with plain base. Should get you a minimum of another 200 fps with the same accuracy (might need load adjustment to do so). ... felix

[ron brooks]

Felix,

Thanks,

Ron

[cbrick]

As velocity increases pay attention to sectional density. The 22's have lower SD's than larger calibers and is why its a bit easier to get the velocity up. Choose a bullet with the lowest SD you can get.

Rick

[georgeld]

Would a couple of you please mic the thickness of gas check metal and post the brands for me?

Would like a compararison to those on that big group buy too IF possible.
Only need a couple readings is all.

Am strongly thinking about making a set of punch's for them. Mostly to play with more than anything.

Thanks much to anyone willing to do this.

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Only time I tried for velocity all I got was key hole's and spray hole's, accuracy was better throwing rocks left handed.

[hubel458]

I've gotten heatreated, lubed(thin hard lube) Dixie 12ga
up to 3250 in 12ga FH. And 400gr Fuselier heat treated, lubed
458 slug up to 3200 in my 458HE. Both above 30 bhn.Ed