QL Request for .270 WSM 140gr Nosler BT Retumbo R-P Case 2.85 OAL

[Heavy Barrel]

Could someone please run the following through QuickLoad?
Is it common for book velocities to be as much as 300fps slower than real velocities?
My intuition is telling me that something is off though I'm not quite sure what or where.


Cartridge: .270 WSM
Case: R-P
Projectile: Nosler BT 140gr
Primer: WLRM
Powder: Hodgdon Retumbo
OAL: 2.85"
Barrel Length: 24"
Case Capacity: 80.9gr H20

Per Hodgdon's and Lyman's data the starting load for this is 68gr and the max load is 71.5gr, I started out with 67.5gr and increased in .5gr increments ending at 72gr. With the starting load per Lyman I'd expect velocities in the upper 2900fps and Hodgdon is saying just over 3000fps, I was already getting velocities over 3250fps. By the time I got halfway up the ladder I was getting flattened primers and early signs of cratering around the firing pin, at that point the average velocity was over 3300fps.

Case Bullet Bullet WT Primer Powder ChargeWT COL Min Max Avg Spread Std Dev R-P Nosler BT 140gr Fed 215 Retumbo 67.5​ 2.85​ 3234.4​ 3283​ 3254.9​ 48.6​ 18.5​ R-P Nosler BT 140gr Fed 215 Retumbo 68​ 2.85​ 3269.3​ 3294.7​ 3284.6​ 25.3​ 9.3​ R-P Nosler BT 140gr Fed 215 Retumbo 68.5​ 2.85​ 3283.2​ 3314.1​ 3294.3​ 30.9​ 10.5​ R-P Nosler BT 140gr Fed 215 Retumbo 69​ 2.85​ 3305​ 3325.9​ 3316​ 20.9​ 8.1​ R-P Nosler BT 140gr Fed 215 Retumbo 69.5​ 2.85​ 3299.6​ 3344.6​ 3322.1​ 45​ 22.5​

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