Rick,
I think I put that wrong. I meant to say a smaller percentage of rifles would have been capable of agging in the teens. I'm sure we agree on that. Where we disagree is that I think they were technically capable of doing so but the shooter's expectations were a bit lower and lower expectations inevitably lead to poorer results. The point I am trying to make is that, in many respects, the equipment race is optional but shooter effort is not.
Now, Let's move on to components. Specifically, bullet design. Over the last 25 years or so, the trend has been toward bullets with longer ogives ans shorter bearing surfaces. In addition, the boattail fell out of favour entirely. Recently, there has been a bit of a resurrection of the boattail and, as well, some experimentation with shorter ogive bullets. Who likes what? Does anyone see a competitive monometal bullet in the future of the sport? Regards, Bill.
Bill, I had dug up the winning aggs from 30 yrs ago then somehow lost the post last night, and decided to pack it in. Anyhow, here are some figures to try and put some context around this. IBS winning 3-gun agg in 1979-1981 was in the 3's (Can't find if any teen aggs shot, but it can't be many with winnning 3-guns in the 3's) .
NBRSA winning agg in 3-gun in 2009 was .198". 19 out of top 20 positions in LV100 this year were in the teens. 13 Records fell this year at NBRSA Nats (yes it was a good week, but not a trigger pull - DanO will attest to that).
I think the shooters have the same tenacity to win today (in many cases it is the same 1 guy!), and in some cases the bullets and powder are
inferior to 30 years ago (no Eubers or original 8208 today), and the wind is the same, and sand is still used to support the rifle at each end. By your own account most shooters had already started to move away from he Rem action around 1980, and yet the aggs continued to fall to the present day! Just based on the above I would argue that the rifles alone are responsible for about .100" improvement in the agging capability over the last 30 years. To be sure, we are at the point of diminishing returns, that was until this year when the NBRSA record book was demolished at the Nats!
I will give you this, an off the shelf BR rifle from 1980 "may" be competitive at the club level in 2010, since many people at the club shoot will have 1980's rifles in hand (myself among them!). I wouldn't want to take it to a Regional shoot or a National shoot. Very hot loads, 5 shot groups in 15 seconds, dual port ejector guns, cnc rifled barrels, stocks with keels, high mag scopes etc will all be working against you!
Bullets will have to wait for another day.
Rcik