AB/BT

[wisconsinteacher]

When developing loads, can one intermix the AB and the BT if they are the same weight? I have both but want to keep the AB for hunting. Will this work or not?

 

[boolit]

I would test AB's and BT's by themselves, they could drift and your scope would need to be adjusted.

 

[SJB358]

It should work out, but I would most definitely drop a grain while making up the second load. Meaning if you develop a load for the 150gr BT first and then switch to the AB, drop down and work back up to your given charge. You should be reasonable close and allow you to interchange once you have proven both loads to be accurate and safe in your rifle. Scotty

 

[JD338]

WT

For load development, keep the AB and the BT seperate. Although very similar, many times they do shoot to a slightly different POI.

JD338

 

[DrMike]

Minute differences in bearing surfaces, jacket thickness, core composition, etc., can introduce significant disparity in results.

 

[boolit]

Minute differences in bearing surfaces, jacket thickness, core composition, etc., can introduce significant disparity in results.

:roll:
that a critter will not be able to tell....

 

[Ridge_Runner]

suposedly from my research, the AccuBond and the ballistic tip of the same size and weight are the same bullet except for the chemicaly bonded core in the AccuBond.
RR

 

[257 Ackley]

Minute differences in bearing surfaces, jacket thickness, core composition, etc., can introduce significant disparity in results.

:roll:
that a critter will not be able to tell....

The game may not be able to tell the difference, but the rifle you are shooting may tell you something completely different. Different bullets, you can never assume..

 

[Greg Nolan]

Once you check the pressures you can customize the load to shoot to the same point of aim at a given distance. I like to use 300 yards with the 7RUM I have the 140 and 160 gr. bullets hit within about 2 " of each other. I'm guessing your's will be close enough at 200 to make a deer cringe.
Greg

 

[hubcap]

When developing loads, can one intermix the AB and the BT if they are the same weight? I have both but want to keep the AB for hunting. Will this work or not?

With my .270 using 140 AB or BT,s both hit the same place on the target at 100 hundred yards using the same load for each. In fact my 150 BT,s are right there as well. :wink: :wink:

 

[boolit]

Minute differences in bearing surfaces, jacket thickness, core composition, etc., can introduce significant disparity in results.

:roll:
that a critter will not be able to tell....

The game may not be able to tell the difference, but the rifle you are shooting may tell you something completely different. Different bullets, you can never assume..

Oh, I forgot, we are performing laser surgery here. :roll:

A nine inch area kill zone requires being anal with accuracy? Or super mags to get the job done?
Where does it end?

 

[HeathSexton]

If I am going to take the time to work up loads and put in the time to get after critters I am going to make sure that I am hitting a little better than a 9" kill area. I do not hunt with magnums but I want every ounce of performance accuracy wise from my rifles.

I have a friends 7RM here right now, he figures a 9" kill zone is plenty big enough to not really worry with accuracy. So far in 3 years he has killed 1 deer and wounded 8 more, great track record he has.

 

[boolit]

If I am going to take the time to work up loads and put in the time to get after critters I am going to make sure that I am hitting a little better than a 9" kill area. I do not hunt with magnums but I want every ounce of performance accuracy wise from my rifles.

I have a friends 7RM here right now, he figures a 9" kill zone is plenty big enough to not really worry with accuracy. So far in 3 years he has killed 1 deer and wounded 8 more, great track record he has.

All rifles now a days shoot 2 inches or better, even with factory ammo..... so it sounds like to me he can't shoot.

 

[HeathSexton]

I'd say it's a combination of both, I have seen a few factory guns that would not do 2" or better.

 

[tpbscha]

I think the issue here is that anytime you change any component in reloading, it is safe practice to back the load off just a bit and work back up. Changing bullets in a load that may be at the threshhold of maximum safe pressures could be the defining factor that causes a pierced primer. By all means, if the two bullets shoot close enough for the OP (which should be achievable) then it's a fine idea. Safety first!

 

[boolit]

I think the issue here is that anytime you change any component in reloading, it is safe practice to back the load off just a bit and work back up. Changing bullets in a load that may be at the threshhold of maximum safe pressures could be the defining factor that causes a pierced primer. By all means, if the two bullets shoot close enough for the OP (which should be achievable) then it's a fine idea. Safety first!

Good idea to start low.... and work your way up.

 

[HeathSexton]

The Nosler book max for H414 and the 55gr NBT in .243 Win will blow primers and you have to take a hammer to the bolt on my friend's .243. He thought since it was in the book it was ok.

Starting at max is never a good idea.

 

[boolit]

The Nosler book max for H414 and the 55gr NBT in .243 Win will blow primers and you have to take a hammer to the bolt on my friend's .243. He thought since it was in the book it was ok.

Starting at max is never a good idea.

So why didn't Nosler have blown primers or a stuck bolt on thier rifles? Personally I don't start at max, for accuracy reasons, but, I have NEVER had a problem with ANY max loads EVER. Had a stiff bolt, but it never got stuck closed. sounds like to me he didn't measure the charge correctly.

 

[SJB358]

I think the issue here is that anytime you change any component in reloading, it is safe practice to back the load off just a bit and work back up. Changing bullets in a load that may be at the threshhold of maximum safe pressures could be the defining factor that causes a pierced primer. By all means, if the two bullets shoot close enough for the OP (which should be achievable) then it's a fine idea. Safety first!

Couldn't have said it better myself. No harm in being safe and controlling risk as best as possible.

Boolit, every rifle is different. A slighty tighter or looser cut chamber will raise or lower pressures quite a bit. That is why they have min and max loads. Scotty

 

[boolit]

I think the issue here is that anytime you change any component in reloading, it is safe practice to back the load off just a bit and work back up. Changing bullets in a load that may be at the threshhold of maximum safe pressures could be the defining factor that causes a pierced primer. By all means, if the two bullets shoot close enough for the OP (which should be achievable) then it's a fine idea. Safety first!

Couldn't have said it better myself. No harm in being safe and controlling risk as best as possible.

Boolit, every rifle is different. A slighty tighter or looser cut chamber will raise or lower pressures quite a bit. That is why they have min and max loads. Scotty

A slighty tighter or looser cut chamber

Can't see how that would effect pressure.... how much of a difference in a chamber size would effect pressure? Maybe dimensions in the bore, but not chamber. Correct me if I'm wrong, but you better have something solid.