I got my barreled action back and the rifle assembled. Also shot a few rounds through it to start the break in and sight in the scope. The barrel is 24" and a 7.5 twist. I built the rifle mainly for heavier bullets but got curious today in what the lightest bullets I might be able to shoot would be. Not that I'm planning on it any time soon, just curious.
6 Creedmoor
- Thread starter pyscodog
- Start date
There's a number of factors that can come in to play on determining that. How hard you're driving them, bullet construction, condition of the throat just to name a few. Nosler B-Tips and Sierra MK's tend to handle high RPM's better than others so I'd imagine you'd maybe be ok shooting the 70gr B-Tips or MK's.
With a 24in 6Creed capable of pushing 55-58 grainers 4000 fps your 7.5tw tube would be a poor choice because bullet RPM would be in excess of 380,000.
I guess if you plan to shoot the 115's all the time a 7.5tw would be the way to go.
With a 24in 6Creed capable of pushing 55-58 grainers 4000 fps your 7.5tw tube would be a poor choice because bullet RPM would be in excess of 380,000.
I guess if you plan to shoot the 115's all the time a 7.5tw would be the way to go.
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Originally Posted By: B23
With a 24in 6Creed capable of pushing 55-58 grainers 4000 fps your 7.5tw tube would be a poor choice because bullet RPM would be in excess of 380,000.
I guess if you plan to shoot the 115's all the time a 7.5tw would be the way to go.
When planning to build this rifle, the intentions of shooting 55-58 grain bullets at 4000 FPS never crossed my mind. It was built to shoot the heavier 6mm bullets. I have a 223 with a fast twist and a 22-250AI and a 243 if I wanted to go with lighter bullets. I was just curious as how light a bullet would shoot in the 7.5 twist "IF" I wanted to, not that I will? Maybe I made the wrong choice on barrel twist? To late to worry about that now. I like the way the rifle turned out and it looks to be like its going to be very accurate. I'll take accuracy over speed any day. A guy told me once all speed does is make you miss faster.
With a 24in 6Creed capable of pushing 55-58 grainers 4000 fps your 7.5tw tube would be a poor choice because bullet RPM would be in excess of 380,000.
I guess if you plan to shoot the 115's all the time a 7.5tw would be the way to go.
When planning to build this rifle, the intentions of shooting 55-58 grain bullets at 4000 FPS never crossed my mind. It was built to shoot the heavier 6mm bullets. I have a 223 with a fast twist and a 22-250AI and a 243 if I wanted to go with lighter bullets. I was just curious as how light a bullet would shoot in the 7.5 twist "IF" I wanted to, not that I will? Maybe I made the wrong choice on barrel twist? To late to worry about that now. I like the way the rifle turned out and it looks to be like its going to be very accurate. I'll take accuracy over speed any day. A guy told me once all speed does is make you miss faster.
PD, your kinda in the same boat as ARC guys with the fast twist and looooong throats. I'm yet to see a single person post a great group and results with 55/58s with either the creed or ARCs.
Most guys with the saami spec long throats and fast twist are ending up with 87gr stuff and heavier.
Most guys with the saami spec long throats and fast twist are ending up with 87gr stuff and heavier.
shelton573
Active member
I run a 26” criterion 1-8” twist with a .104 freebore for long bullets. I run 70 gr Sierra BKs at max load with varget and have never had a blow up. I was told they wouldn’t shoot because I couldn’t touch the lands. Never attempted to do so. Seated them to a bullet diameter deep, ran through the powder charges, settled on max load, tried 3 different primers, settled on a primer, loaded 350 of them and killed prairie dogs. They regularly shoot .5” +/- depending on me. I am running them 3800ish IIRC.
Originally Posted By: shelton573I run a 26” criterion 1-8” twist with a .104 freebore for long bullets. I run 70 gr Sierra BKs at max load with varget and have never had a blow up. I was told they wouldn’t shoot because I couldn’t touch the lands. Never attempted to do so. Seated them to a bullet diameter deep, ran through the powder charges, settled on max load, tried 3 different primers, settled on a primer, loaded 350 of them and killed prairie dogs. They regularly shoot .5” +/- depending on me. I am running them 3800ish IIRC.
70 gr BK's at 3800 should be quite a show on a PD.
70 gr BK's at 3800 should be quite a show on a PD.
shelton573
Active member
Originally Posted By: tj66Originally Posted By: shelton573I run a 26” criterion 1-8” twist with a .104 freebore for long bullets. I run 70 gr Sierra BKs at max load with varget and have never had a blow up. I was told they wouldn’t shoot because I couldn’t touch the lands. Never attempted to do so. Seated them to a bullet diameter deep, ran through the powder charges, settled on max load, tried 3 different primers, settled on a primer, loaded 350 of them and killed prairie dogs. They regularly shoot .5” +/- depending on me. I am running them 3800ish IIRC.
70 gr BK's at 3800 should be quite a show on a PD.
It’s pretty shocking especially when you hit the big fat ones
70 gr BK's at 3800 should be quite a show on a PD.
It’s pretty shocking especially when you hit the big fat ones
I have a bolt action and an AR10 6mm Creedmoor. I've played around with loading 55gr Varmageddons, 70 gr ballist tips, 80 gr ballistic tips, 87gr Vmax, 107gr sierras and 115gr Bergers.
I would agree the fast twist 6mm Creedmoor it isn't a great choice for light bullets like the 55gr varmageddons. I've been able to get over 4000 fps or 5 shot groups less than 1" with 55gr bullets. I haven't been able to find a fast and accurate load in my rifles. I would have to look up my load data if you are interested in what worked for me but I believe I was using CFE 223 to push the 55gr bullets around 3600 fps for my best groups.
I would agree the fast twist 6mm Creedmoor it isn't a great choice for light bullets like the 55gr varmageddons. I've been able to get over 4000 fps or 5 shot groups less than 1" with 55gr bullets. I haven't been able to find a fast and accurate load in my rifles. I would have to look up my load data if you are interested in what worked for me but I believe I was using CFE 223 to push the 55gr bullets around 3600 fps for my best groups.