Question on C.O.A.L. Chamber too long?

[swift]

You can load up to as long as your mag will allow , bUT you need to have 1/3 of bullet diameter as min seating depth ! All my weatherby rifles are the same it's called Freebore or Throat and is to help with high PSI spikes
And I have been hand loading for 25 years
Run them as long as you can !

[timberghost72]

You can load up to as long as your mag will allow , bUT you need to have 1/3 of bullet diameter as min seating depth ! All my weatherby rifles are the same it's called Freebore or Throat and is to help with high PSI spikes
And I have been hand loading for 25 years
Run them as long as you can !

This is what I was trying to get answered in a long winded way  Sorry for not explaining myself too good.  So with this, a .308" bullet would have a minimum of around .1027" seating depth into the case?  1/3 of bullet length is what I was originally thinking.

[nastybynature]

Scared to jump into this thread.... Lol.

My 700 30-06 likes oal of 3.450 (30 thousandths off landing) with the 180 gr nosler accubonds over 49gr of 4064. This has given me a velocity of 2634fps with very little variation (30fps) over the 10 round test average.

I know you are running a different bullet but hoped this might give you some reference.

Sent from my XT1080 using Tapatalk

[magnumb]

For some reason tsx bullets usually do well with more jump than some other bullets might like.  Barnes recommends 0.050 jump to start with.  I'd probably work up a load at that length and then adjust seating depth from there to fine tune it.

This is exactly right and it comes directly from Barnes.  I've loaded the TSX's and TSX's since the first batches came out and found the 0.050 initial seating depth to be correct.  All my seating depths go a bit deeper than that as my only concern then becomes wringing out the most accurate seating depth.

The design of a particular bullet is huge in handloading.  The 0.050 applies to the TTSX's and TSX's, while not necessarily applying to the earlier 'X' bullets, also produced by Barnes.  The 'load 'em to the lands (riflings)' mantra of old can still produce results that we desire, but it also most certainly needs to be done by both a experienced handloader and one that doesn't push for the most velocity possible.  Increased pressures are to be expected the longer the COAL.

The particular Barnes bullets I've mentioned using all benefit from this modification of handloading protocols of old, as far as eeking out the most accuracy in relation to COAL's.  The design of all bullets and the accuracy that one can achieve, truly do depend on finding the perfect COAL.

For me, that process is both fun and so far has been very rewarding.

Good luck....

[TVHunts]

My experience is also that Barnes bullets like more jump than some other bullets.  Nosler Partitions are also known for liking bullet jump. 

I use Barnes 210 gr. TSX FB in a 338 WM and 270 gr TSX FB in my 375 H&H.  Both are seated closer to .010 off and both factory rifles will hold under 3/4" MOA.   Personally I wouldn't concern myself what the OAL is as long as you aren't closer than .050, have the mag well room and,  go with the length that gives you the best accuracy.  I'd take accuracy over speed every time.

Curious though,  if your needing to be conscious of spending money on components why don't you try Accubonds or a Hornady bullet?  They are much more economical than the Barnes is.  But I have to admit, I really like how the Barnes stay together,  pedal out just like the pictures if you can recover them.   

Good luck

[timberghost72]

I am not stuck on Barnes. It is what I have right now. But I will say that they perform extremely well. Everything I've shot, dropped within 20 yards with awesome penetration and vital organ damage without much meat loss. I would like to try other bullets and I will as time goes on.

So I will start my loads at .050" off the lands and go with book specs on powder charge and go from there. Should be fun to see how different it performs from previous loads.

Thanks all. I'm sure more questions will come. I'll post results hopefully this weekend.

[hub]

The 700 BDL,s I have loaded for were all rather long throated. Certainly 3.410 is not a problem at all. That should mean your bullet is seated around .040 below the bottom of the neck if you use 3.360. Your gonna have plenty of room for for a near perfect powder fill with say H4350 or IMR 4350. .050 off the lands for the 165 TSX appears to me a near perfect starting point. I just think your old load had way too much jump and took up  too much powder capacity. I like your 3.360 plan much better. 

[timberghost72]

 . I am using IMR 4350.

[Bwana Bob]

Another thing I found loading Barnes bullets is that they tend to shoot more accurate with max loads / velocity if that helps.

[Jonathan_S]

This is a good thread.

I've got an older (2000 era) Savage rifle in .25-06 and nothing loaded from the factory fits in it anymore...all too long and contact the ogive.

It's actually the reason I got into hand-loads about 5 years ago.  Some bullets definitely prefer to jump a little farther.  I always start out with .050"

I am not as into it as many but when I can shoot tight, tight groups at 200 with a well constructed bullet then I am done experimenting.

[Jonnyjammer]

This is a good thread.

I've got an older (2000 era) Savage rifle in .25-06 and nothing loaded from the factory fits in it anymore...all too long and contact the ogive.

It's actually the reason I got into hand-loads about 5 years ago.  Some bullets definitely prefer to jump a little farther.  I always start out with .050"

I am not as into it as many but when I can shoot tight, tight groups at 200 with a well constructed bullet then I am done experimenting.

This is odd to me.What I mean is that over time after a lot of shooting a rifle burns the throat of a rifle giving it a longer jump,Adding to your coal will revitalize an old rifle.Bringing back some lost accuracy. 

[Jonathan_S]

Yeah it's weird, this gun hasn't been shot more than 300-400 times

[Jonnyjammer]

Is it build up or was it like that since new or what?

[Jonathan_S]

It's totally clean.  2.3125"  Is the longest I can go.  Every load data out there has standard at 2.325"

It's no big deal, just a custom job 

[Jonnyjammer]

Cool,Whatever makes a custom a custom is cool with me lol.