250FTX report good and issues

[bowbender6]

Tried some 250FTX looking for an accurate 250 class bullet to shoot with N110. First two targets looked great. Shot at 90 yards then 170 yards. Thought I had something. Ran out of Fed 209A primers and switched to CCI 209M and groups opened up. Tried some Win 209 with my hunting load (300 BO) and groups were normal so nothing was up with the gun. On 3/20 got some Fed209A (my usual primer) and shot the 250FTX with N110. Never got the good group again. Don’t know why. Anyone got any ideas? I also noted that the first shot after switching between N110 and N120 was way out of group. Anybody else get this? I don’t swab or clean the gun, it shoots better this way. I might try swabbing but in the past that has always made my groups larger. My barrel is on the lose side and is rough like a zipper

Savage ML II SS Thumbhole bedded 4-16x Sightron
Vent .033, No swabbing, Sabot indexed 2 lands/petal
Led sled 25lb, no hold front of stock
Wait - 15-minute minimum
250FTX__ 44gr N110__Red Crush Rib

#1__3/13__.Fed209A__2385 ave _35 deg 90yards_.75”MOA 2398,2393,2380
#2__3/14__.Fed209A__2364 ave_35 deg 170yards_1.3”MOA 2355,2364,2372
#3__3/14__CCI209M__2396 ave_35 deg 170yards_3.0”MOA 2372,2372,2364
#4__3/14__CCI209M__2373 ave_50 deg 170yards_4.0”MOA 2368,2376,2376
#6__3/14__CCI209M__NA 90yards_2.6”MOA
#7__3/20__Fed209A__2375 ave _ 40 deg 90yards_. 3.3”MOA 2376,2380,2364,2380

My standby load
300 BO – 60 gr. N120 – BCR
#5__3/16__Win 209__90yards_. 82”MOA

[Dave W]

Any idea why your velocity jumped approximately 75fps? Differences in temps from session to session? Checked vent?

[bowbender6]

Sorry Dave The velocities on target #1 are wrong – I screwed up the right ones are above now.

I checked the vent before and after with pin gauges. .033"