FN SPR Tenon and Extractor Cut

grabcad

To chamber a Benchmark Sendero 6.5mm barrel on an FN SPR action, I created my own specifications since none were available. Using these dimensions, I chambered and headspaced the barrel with a PTG 6.5 Creedmoor reamer. The result? A rifle that feeds and functions flawlessly, delivering consistently accurate shots (around 1/2 MOA) with 140 AMAX bullets. However, remember to properly headspace and adjust boltface clearance for optimal performance. Note that due to standard manufacturing variances, your extractor cut depth might differ.