I'll give two examples.
1-Winchester Extreme 308 Winchester. Sell the original stock for $150-175. Buy a McMillan Hunters with Edge fill. Toss the original trigger spring and replace with an Ernie. Done.
2-Buy a pre 64 model 70 featherweight in 270 Winchester. Repeat the stock swap as described above. If needed send the rifle out for a trigger job. Good to go. Really done.
I've done the above as described several times and am happy with the results.