Buy a remington 700sps varmint. You get a 26" heavy barrel
Bought mine on sale under $600
+1 for this.
Rem 700 SPS in .308 - $500
HS Precision stock- $200
Bedding and oversized bolt knob - $150~200 (can't recall what I paid for the work but it was around there)
Vortex Viper PST MOA 6-24x- $800
Total ~ $1700.00
Handloads are 178gr Hornady Amax over 45.7gr of Varget.
I regularly shoot out to 950yrds with this set up on a IPSC style sized steel gong. Farthest I've taken this rig was 1050yrds on a 16" wide steel gong and made regular (not every time but 7/10) hits. I know it can be a little more accurate with some better ammo/practice/shooter but i'm very happy for my first LR rifle.