Bullet length or weight for load data

[DUNEZRUNNER]

I have a 6mm Remington rifle that I am getting ready to start loading for. I am going to use the Barnes 80gr TTSX bullet and want to use Varget powder. I can't find any data for this combo anywhere. I am going to have to start from scratch and find a load. Being that the copper Barnes bullet is longer than a comparable lead core bullet, what data should I be looking at?

I am thinking I should look at 100gr bullet data (roughly the same length) and start low and work my way up. The reason I am thinking this is that with the bullets being similar in length, the case capacities will be the same and then the pressure should be similar.

Does anyone out there have any experience with this or any ideas?

Thanks

Thomas

 

[243winxb]

80 GR. BAR TTSX BT Hodgdon Varget .243" 2.810" 38.0 3140 47,900 PSI 42.5 3416 59,800 PSI Hodgdon website. Cartridge Information

Case: Winchester Barrel Length: 24"
Twist: 1:9" Trim Length: 2.223"
Primer: Remington 9 1/2

 

[DUNEZRUNNER]

Thanks, For some reason, I had 85 gr on my mind. I feel kind of dumb now.

But anyways, on my question for future information, is it the weight or the length of the bullet that load data on should use for working up a load when info isn't readily available.

Thanks again

Thomas

 

[243winxb]

6mm Remington

Look at Barnes data. There bullet maximum weight online is 85gr for 6mm Rem.. Correction* Your correct, its the length of the bullet more than the weight when matching bullet to the barrel twist rate. From Barnes website

*The 1:12” twist originally used in .244 Remington rifles is still suitable for the 62-grain Varmint
Grenade. Barnes 75-grain Banded Spitzer and 85-grain TSX bullets require the faster twists
typically featured in modern rifles chambered for this cartridge.

http://www.barnesbullets.com/images/6mmRemingtonWeb.pdf

 

[243winxb]

COL should be .050" off the lands. In other words, the ogive should be back from the rifling .050" From there move forward or back. Should still be on there website some where?? I have never used Barnes bullets.

Do I seat TSX bullets .030 inch to .070 inch from the lands, starting at .050 inch off the lands, as recommended with other X-style bullets?
Yes. All-copper TSX Bullets typically give better accuracy when seated off the lands and grooves (the rifling in the barrel).

 

[Haxby]

for future information, is it the weight or the length of the bullet that load data on should use for working up a load

Weight.
If you try working up a load for a short, heavy, roundnose bullet using data for a lighter, pointy, boat tail that happens to be the same length, things could go badly.

 

[243winxb]

Haxby, good catch on my misinformation. Hope this corrects it.

Correction*Bullets of the same weight & construction may use the same starting powder charge. Its the length of the bullet more than the weight when matching the bullet to the rifling twist. Longer bullets need a faster twist. Bullets like mono-metal Hornady GMX, all copper, partition, Berger match with heavy copper jacket, may produce more pressure then a standard lead core, copper jacket bullet of the same weight.

 

[gamestalker]

Bullet weight is always the reference point regarding published data for powder charges. Even though Barnes copper bullets are in fact longer, and some data may adjust for that, but even so, powder charges are still going to be published according to projectile weight, if that's what you were asking?

GS

 

[DM~]

This is why you SHOULD go to the "bullet maker" for your load data!

DM