30-06 twist rate

Conventional design cup core 220's require somewhere near 1 in 10 twist to stabilize.

150's ideal twist is around 1 in 14.

Looks like you got yourself a conundrum.
 
Conventional design cup core 220's require somewhere near 1 in 10 twist to stabilize.

150's ideal twist is around 1 in 14.

Looks like you got yourself a conundrum.

What's the conundrum? 150's in a 1-10 twist bbl have been shooting just fine for years in 30-06. Its the standard twist rate for most 30-06 bbl'd rifles.
 
If you are going to shoot 220 grain bullets, stick with the standard 1:10. Here are some other recommendations:

8" For bullets heavier than 220gr.
10" For bullets up to 220 gr.
12" For bullets up to 170 gr.
14" For bullets up to 168 gr.
15" For bullets up to 150 gr.
 
What's the conundrum? 150's in a 1-10 twist bbl have been shooting just fine for years in 30-06. Its the standard twist rate for most 30-06 bbl'd rifles.


In some of the dozen or so 1 in 10, 30'06's I've owned and helped work loads up for I can only think of a couple that would shoot 150's better than 180's or 200's.

who'd a thunk it.
 
Yes, I've always considered 150 grain in standard 10" twist 30-06 to be less accurate than the heavier bullets.
I think most people don't realize how accurate 220 grain bullets are in them, maybe because few people have actually tried them.
The first time you try 220s for accuracy you will likely be in for a surprise.
 
Yes, I've always considered 150 grain in standard 10" twist 30-06 to be less accurate than the heavier bullets.
I think most people don't realize how accurate 220 grain bullets are in them, maybe because few people have actually tried them.
The first time you try 220s for accuracy you will likely be in for a surprise.

Amen

Simply constructed with a round nose, sure seems to sort out a lot of the wonky accuracy issues.

K.I.S.S

But then again that don't sell all the new guchi poly carb this that or the other things being advertised
 
From the Shilen Barrels site:

.308
- 8" for bullets heavier than 220gr.
- 10" for bullets up to 220gr.
- 12" for bullets up to 170gr.
- 13"* Ratchet rifled 4 groove
- 14"* for bullets up to 168gr.
- 15"* for bullets up to 150gr.
- 17"* for bullets up to 125 gr.

They should know what they are talking about. I would pick a 1:10 twist for most any .308 barrel I was buying.

Mark
 
I have owned many, many 30-06's, and many other 30 cal rifles of one chambering or other. They have all been either 1-10" twist or 1-12" twist. The 1-10" barrels are great with 190, 200 & 220 grain pills, usually just fine with the lighter stuff as well. Any 30 cal rifle I have owned with 1-12" twist was great up to 200 grain flatbased bullets and 180 grain Boattails, but gave "iffy" performance with longer boattail bullets in 190, 200, 210 and 220 grain weights. The 1-10 is really the "all-rounder" that is most frequently found, and is probably the most versatile. Regards, Eagleye.
 
Amen

Simply constructed with a round nose, sure seems to sort out a lot of the wonky accuracy issues.

K.I.S.S

But then again that don't sell all the new guchi poly carb this that or the other things being advertised

:D
Of course Cabelas/Lebarons would much rather sell you a $65 box (20) of Winchester XP3 cartridges than a $22 box of rounds pushing 220 grain Power Points.

Tried 180 grain Remington PSP Core-Lokts from my Savage Model 116 .30-06 Sprng. bolt the other day.............one ragged hole at 100yards........I couldn't tell the different impact points apart because they were almost concentric. :D

The 150 grain Core-Lokts grouped tight.......... but not as tight as the 180's.

On the other hand........my Browning BLR in .308 Win. grouped the 150's within 3/4" but the 180's were all over the paper..........go figure.
 
In some of the dozen or so 1 in 10, 30'06's I've owned and helped work loads up for I can only think of a couple that would shoot 150's better than 180's or 200's.

who'd a thunk it.

You're right, its easier to work up 180 gr and heavier loads BUT several 150 and 130 gr loads have turned in very acceptable accuracy. They do require some tinkering especially on powder charge. The main beef I have with 30-06 loads of diff bullet weight is the extreme change in POI. The 1-10 bbl I shoot can deliver satisfying accuracy with bullets ranging from 130 to 220gr. The extreme spread of versatility and capability is why the boring old odd six is still held in high regard by those who know new and ###y translates to broken hearts and unfulfilled promises.
 
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