Reloading .223 Remington with X-Terminator

Captain Chuck

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Is anyone using Ramshot X-Terminator for reloading .223? I have looked in Ramshot's On Line Load Guide. All of the X-terminator Data seems to be for 1:12 Twist. I will be using a 1:9 Twist. Bullets will be Winchester 55 grain jacketed boat tail bullets with a cannelure. Does anyone have a load with X-terminator Powder? Thanks for all replies.
 
i personally wouldn't dabble with it. if you feel the need to try, give the powder manufacturer a call they will know the answer.





beat you to it Duke......[smile]
 
The difference in twist rate should not have a significant effect on pressures. I'd start with the data for the Sierra 55 gr. bullet.

B
 
All of the X-terminator Data seems to be for 1:12 Twist. I will be using a 1:9 Twist.
Not a factor.

I know dweebs over at arfcom make a huge issue of twist rate affecting pressure and barrel wear. They are all full of shit and are ignorant of what causes wear in a rifle bore.

Hint: powder flame temperature and flame duration has everything to do with rifle bore wear. And all the wear is from the throat fwd.
 
My way of thinking with regard to the twist rate:

If you send a bullet down a barrel, and cause it to rotate (which is the purpose of the twist), the lighter the bullet for the same amt of powder, the faster it will travel down the barrel, and the faster it will spin.

If you load a bullet that is recommended for 1:12 twist (I have some 32 grain .22 diameter bullets which should only be loaded in 1:12 twist) in a 1:9 twist barrel, they will be spinning so fast when they leave the muzzle (in some cases better than 200,000 RPM's), that they will centrifugally fail in flight. Even the copper shell won't keep them together well.

Exaggerating to make the point, if you took the same bullet as cast (presuming you could make as cast bullets go that fast, which you CAN'T), it would be spinning so fast that it would fly apart into shrapnel virtually as soon as it left the barrel.

I have taken some liberties I know with my example. Don't chop my head off. I just wanted to put it in some terms that you could visualize.

Just as there is a minimum flight rate for a given bullet weight (so that it's dynamically stable in flight), there's also a maximum centrifugal spin rate.

And, that has everything to do with twist rate of the barrel, bullet speed, and bullet weight for a given diameter.

Always check with the bullet manufacturer in any of those cases where it's close. Just the fact that you are asking the question in the first place tells me that there's a potential issue. The bullet manufacturer will advise you IF it's OK to do what you are thinking of doing.
The aforementioned is with regard to lighter bullets in faster twist rate barrels. IE, doesn't answer his question, but touches on an adjoining subject.

With regard to powder use, with an otherwise reasonable powder, keep in mind that some reloading data books are written with bolt action guns in mind. Most of those have a longer twist rate (1:12 instead of an AR style 1:9). It's the reason to have on hand and use sveral sources of current data for your reloading.

And, as has been pointed out, the ULTIMATE source for the powder questions rests with the powder manufacturers.
 
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I have had Hornady VMAX 95 grain .264" bullets fly apart when lauched out of a 28" 1/8 barrel in my .260 Remington HP target rifle.

OTOH, I've shot bucketfuls of 45 grain WWB HP .223 out of a 20" 1/7 barrelled AR without a single bullet failure.
 
Is anyone using Ramshot X-Terminator for reloading .223? I have looked in Ramshot's On Line Load Guide. All of the X-terminator Data seems to be for 1:12 Twist. I will be using a 1:9 Twist. Bullets will be Winchester 55 grain jacketed boat tail bullets with a cannelure. Does anyone have a load with X-terminator Powder? Thanks for all replies.
Maybe look at western powders 5.56 data with 1:7 twist and split the difference. Some bullet designs have thinner jackets and can spin apart . I have some 52 gn match bullets that do well in my 1:7 then again I have 50 gn varmint bullets that where going poo a 1/8 20” barrel

i dont know what the actually rpm is for self destruction but some where between 160-175k rpm you will find good accuracy and cast bullets 120-140000 rpm

bullet rpm. Velocity X 720 \ twist = rpm

i forget what the goal is for best accuracy
Highest velocity with slowest rpm to stabilize the bullet, something like that
 
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