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How about those speer bullets?

 
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  #8  
Old 01-30-2013, 08:39 PM
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Re: How about those speer bullets?

Mine were the 75 gr. HP's, and to be fair I didn't give them a great deal of attention because I had already found a good load with the Hornady's. My gun has a 1:9 twist. Good luck!
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  #9  
Old 01-30-2013, 09:26 PM
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Re: How about those speer bullets?

I've shot speer a good bit and they are for the most part good bullets. Some are tough to get to shoot, but their TNT bullets are some of the most accurate "soft" bullets I've ever seen. We even got the 70 tnt to shoot under 1 moa in a savage 243 that the factory screwed up on and put it together with a 25 caliber barrel. Yep, they were obdurating AND accurate in the next bore up. The only speer I'm actively loading at present is the 120 grain 25 cal bt for my 25 wssm. It'll do 1/2 moa of you do your part, and 1/4 moa if it wants to.
I put a few 270 bt speer through my rem. 375 H@H that I had left on the shelf for over ten years from my first 375. I stuffed a good bit of I 4320 under them, and proceeded to shoot a no load developement .3" group with an 8# 375h@h at 100 yards. It's the best group from the pipe so far, but this rifle is a solid sub moa performer with barnes, and I have plenty of the 300 tsx loaded.
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  #10  
Old 01-31-2013, 11:16 AM
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Re: How about those speer bullets?

Quote:
Originally Posted by rick523 View Post
Trickymissfit
Well my bad, I didn't want to walk outside to my office this morn since it was pouring down rain so I was going off top of my head on weight, just went and looked they are 100 grain boat tails and they didn't work for me. It's been a couple of years ago when I tried them you know what they say memory is first thing to go. Now I gotta go shake off.
Rifle is a 10 twist.
I had two 6mm barrels a few years back, and they were both from the same folks, and were said to have the same twist rate. But one was about 2/3rds of an inch faster twist rate than the other! Yet neither barrel was the claimed 1:9 twist rate. One was about 1:9.5 and the other was actually slightly slower than 1:10. Never really noticed this much till I started to climb the B/C chain. Yes I could have cussed Walt Berger, and been done with it, but I wanted to know why. That also about the time I learned that not all barrel throats were cut them same for a certain bore size.

I usually think of Speer bullets as hunting bullets, and in most cases they've worked well for me. But really not seriously better than anybody elses, and vise versa. They are not target quality bullets in my opinion. But I've found they are better than most in the big bore lever guns I own (much better). I could also set here and cuss Bitter Root Bullets, but I also know there was nothing wrong with the bullets or construction. They just didn't work well in the barrels I tried them in.

I think most U.S. bullet manufacturers make good bullets, but they don't always work well in our intended applications we put them in.
gary
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  #11  
Old 01-31-2013, 11:35 AM
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Re: How about those speer bullets?

Quote:
Originally Posted by jkupper View Post
Mine were the 75 gr. HP's, and to be fair I didn't give them a great deal of attention because I had already found a good load with the Hornady's. My gun has a 1:9 twist. Good luck!
Just looked at the specs for the 75 grain bullet in the Speer manual (have never used these in a 6mm). That bullet has a .23 B/C, and with a 1:9 barrel your way too fast for the B/C. That bullet at 3400 fps (.243) is spinning at about 270K as it leaves the muzzel! The bullet is labled as one of their "TNT" bullets made for varmit hunting. The jackets are fairly thin and will seriously be taxed at that kind of rotational speed! Even at 3000fps the speed will be a little faster than 239K rpm. But the same bullet out of a 1:14 twist barrel would be 175K rpm (3400 fps), and just about right. The over rotation speed of a bullet also tends to spread the group sizes (about 3/32" per .0001 error in the C/G). That error factor also increases as the bullet spins faster.
gary
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  #12  
Old 01-31-2013, 11:46 AM
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Join Date: Jun 2010
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Re: How about those speer bullets?

Quote:
Originally Posted by Lefty7mmstw View Post
I've shot speer a good bit and they are for the most part good bullets. Some are tough to get to shoot, but their TNT bullets are some of the most accurate "soft" bullets I've ever seen. We even got the 70 tnt to shoot under 1 moa in a savage 243 that the factory screwed up on and put it together with a 25 caliber barrel. Yep, they were obdurating AND accurate in the next bore up. The only speer I'm actively loading at present is the 120 grain 25 cal bt for my 25 wssm. It'll do 1/2 moa of you do your part, and 1/4 moa if it wants to.
I put a few 270 bt speer through my rem. 375 H@H that I had left on the shelf for over ten years from my first 375. I stuffed a good bit of I 4320 under them, and proceeded to shoot a no load developement .3" group with an 8# 375h@h at 100 yards. It's the best group from the pipe so far, but this rifle is a solid sub moa performer with barnes, and I have plenty of the 300 tsx loaded.
I once had a 6mm that was a rock solid .38" rifle. Not bad, and there was probably another .10" in the group size that could be taken out of it. A guy I made bullet punches for and some other odd looking things gave me a about five hundred 70 grain bullets that were bench rest quality, and used by some well known folks. I tried them in that 6mm, and the groups were all over the place (1:9.5 barrel twist). I just put them on the shelf and forgot them. Later I put together a 6BR with a 14 twist barrel. The barrel was of benchrest quality but the chamber was just OK as the throat was a little too long. I started out shooting in the mid threes with these same bullets, and later got down in the mid twos. There was about 250 fps difference between these two guns, but the 6BR was a 14 twist barrel.
gary
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  #13  
Old 01-31-2013, 11:50 AM
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Join Date: Jan 2013
Location: Nebraska
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Re: How about those speer bullets?

Quote:
Originally Posted by Trickymissfit View Post
Just looked at the specs for the 75 grain bullet in the Speer manual (have never used these in a 6mm). That bullet has a .23 B/C, and with a 1:9 barrel your way too fast for the B/C. That bullet at 3400 fps (.243) is spinning at about 270K as it leaves the muzzel! The bullet is labled as one of their "TNT" bullets made for varmit hunting. The jackets are fairly thin and will seriously be taxed at that kind of rotational speed! Even at 3000fps the speed will be a little faster than 239K rpm. But the same bullet out of a 1:14 twist barrel would be 175K rpm (3400 fps), and just about right. The over rotation speed of a bullet also tends to spread the group sizes (about 3/32" per .0001 error in the C/G). That error factor also increases as the bullet spins faster.
gary
Thanks! Now I know why they didn't want to shoot. I wasn't too worried about it at the time, because I already had a load. It was just something that I thought I would try out because I got some for almost nothing.
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  #14  
Old 01-31-2013, 12:30 PM
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Re: How about those speer bullets?

Quote:
Originally Posted by jkupper View Post
Thanks! Now I know why they didn't want to shoot. I wasn't too worried about it at the time, because I already had a load. It was just something that I thought I would try out because I got some for almost nothing.
Walt Berger once told me that 179K rpm was about right (on impact) for most of the VLD bullets, but he didn't explain the twist rates to me. I chased my tail for about a year and a half till Ferris Pindell told what I was doing wrong. Every barrel has a sweet spot for the B/C it likes just like the throat has one as well.
gary
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