107 vs. 108 vs. 110 vs. 115---Help Me Pick a Bullet

[Bully 749]

I'll be building a regular old 243Win for my next shooter. I'm looking at the heavier weight bullets and wondering what direction I should go. The rifle will be a paper shooter at 300 with possibly a local comp or two and will go on steel to 1k once a year. I'll be running a 26" (+/- 1/2") 7 twist tube so I can handle the heavier bullets. Once I figure out a bullet I'll set the chamber up with my buddy and we'll get that all figured out. 

I'm hoping to get them to run just about 3k. 

I'm just going roundy-round on bullet choice so I figured let me defer to the experts (or at least more informed than myself) on the site. Any help is appreciated.

[Scorpio64 5,153]

1:7 seems kinda fast for .243.  I doubt you will get close to 3000fps with heavy for caliber bullets with that twist rate.

[T Bill 649]

A 108 seems to perform the best on paper I guess in the field would verify this.  Experience tells me max speed never wins in accuracy, look for something around 2800 plus or minus.  Powder would seem to be a factor as well, 243 and barrels seem to have this love hate relationship and sometimes the results are more than popped primers. 

[Rob0115 1,105]

I’m running 105 and 107 in my 6mmAR. I know it’s a different platform but it’s 1;7 twist and both fire .243/6mm bullets. 

[Bully 749]

Thanks all.

As far as barrel "life" I'm not all that concerned about it.  I'm learning to chamber/thread my own barrels so the cost is somewhat cut by that. 

As far as speed, I want to be in the 3k neighborhood.  In a 243Win it looks like I'll be within 50fps or so with the right powder and a 110SMK.  I have 100 of these on the way to try out even though the rifle won't be ready for quite a while.  The 110 requires a 7 twist because of it's design.  It's not always a weight thing, it's more often a length thing.  

I appreciate all the feedback.  

[John Boy 6]

Search up the Powley Calculator and determine which bullet will provide the highest stability factor